chore: migrate Travis CI to container-based builds and update README links

- Switch Travis CI from sudo-based apt-get to addons.apt.packages for gcc-multilib
- Enable container-based builds with `sudo: false`
- Update README.md call-to-action links to point to getting-started and browser playground
- Replace `printList_` with `printAll` in IO class and remove redundant `IO.` prefixes
- Add IO.read() method documentation and update IO.print docs for up to 16 arguments
- Reorganize community page with Libraries, Language bindings, and Tools sections
- Add wrenjs JavaScript binding and Sublime Text syntax highlighting
- Fix typo "no where" to "nowhere" in fibers documentation
- Add indentation to preprocessor defines in wren_common.h for consistency
- Remove unreachable `return 0` after UNREACHABLE() in wren_compiler.c
- Fix Windows color output by wrapping text in str() in test script

doc/site/community.markdown

@@ -10,18 +10,21 @@ There's one Wren user group, and it's the [official Wren mailing
 list](https://groups.google.com/forum/#!forum/wren-lang). Please join it and
 say hello! There are no strangers to Wren, just friends we haven't met yet.
 
-## Third-party libraries
+## Libraries
 
 There are some third-party libraries that are written in Wren. Here's the list:
 
-- [wren-test](https://github.com/gsmaverick/wren-test), a testing framework
-- [Please](https://github.com/EvanHahn/wren-please), an assertion library
-- [wren-colors](https://github.com/gsmaverick/wren-colors) for printing colored
-  messages to the terminal
-- [3D vectors for Wren](https://github.com/EvanHahn/wren-vector3d)
+- [Please](https://github.com/EvanHahn/wren-please): An assertion library.
+- [wren-colors](https://github.com/gsmaverick/wren-colors): Print colored
+  messages to the terminal.
+- [wren-test](https://github.com/gsmaverick/wren-test): A testing framework.
+- [wren-vector3d](https://github.com/EvanHahn/wren-vector3d): 3D vectors.
 
-A few people have also added Wren bindings for other languages:
+## Language bindings
 
+Want to host a Wren VM within another language. Try these:
+
+- [JavaScript: ppvk/wrenjs](https://github.com/ppvk/wrenjs)
 - [Rust: tilpner/wren-sys](https://github.com/tilpner/wren-sys)
 - [Rust: pwoolcoc/wren-sys](https://github.com/pwoolcoc/wren-sys)
 - [Rust: pwoolcoc/wren-rs](https://github.com/pwoolcoc/wren-rs)
@@ -30,8 +33,16 @@ A few people have also added Wren bindings for other languages:
 
 If you want Wren syntax highlighting in your editor, look no further:
 
-- [Vim](https://github.com/lluchs/vim-wren)
 - [Emacs](https://github.com/v2e4lisp/wren-mode.el)
+- [Sublime Text](https://github.com/munificent/wren-sublime)
+- [Vim](https://github.com/lluchs/vim-wren)
+
+## Tools and Utilities
+
+Things that make life easier:
+
+- [The Wren Nest](http://ppvk.github.io/wren-nest/): Run and share Wren in your
+  browser.
 
 Do you have anything to add here? Send a [pull request][]!
 

doc/site/core/io.markdown

@@ -7,38 +7,54 @@ The IO class can be used to read and write to and from the console.
 
 ### IO.**print**(objects...)
 
-Prints any number of things to the console and then prints a newline
-character. If you don't pass it a string, it will be converted to a string for
-you. When passed multiple things, Wren outputs one after another.
+Prints a series of objects to the console followed by a newline. Each object is
+converted to a string by calling `toString` on it. This is overloaded to
+support up to 16 objects. To pass more, use `printAll()`.
 
+  > IO.print("I like bananas")
+  I like bananas
+  > IO.print("Oranges", 10)
+  Oranges10
 
-	> IO.print("I like bananas")
-	I like bananas
-	> IO.print("Oranges", 10)
-	Oranges10
-	>
+### IO.**printAll**(sequence)
+
+Iterates over [sequence] and prints each element, then prints a single newline
+at the end. Each element is converted to a string by calling `toString` on it.
+
+  > IO.printAll([1, [2, 3], 4])
+  1[2, 3]4
 
 ### IO.**write**(object)
 
-Prints a single thing to the console, but does not print a newline character
-afterwards. If you pass it something that isn't a string, it will convert it to
-a string.
+Prints a single value to the console, but does not print a newline character
+afterwards. Converts the value to a string by calling `toString` on it.
 
-	> IO.write(4 + 5)
-	9>
+  > IO.write(4 + 5)
+  9>
 
 In the above example, the result of `4 + 5` is printed, and then the prompt is
 printed on the same line because no newline character was printed afterwards.
 
+### IO.**read**()
+
+Reads in a line of text from stdin. Note that the returned text includes the
+trailing newline.
+
+  > var name = IO.read()
+  John
+  > IO.print("Hello " + name + "!")
+  Hello John
+  !
+  >
+
 ### IO.**read**(prompt)
 
-Reads in and returns a line of text from the console. Takes a single string to
-be used as a prompt. Pass an empty string for no prompt. Note that the returned
-line of text includes the newline character at the end.
+Displays `prompt` then reads in a line of text from stdin. Note that the
+returned text includes the trailing newline.
 
-	> var name = IO.read("Enter your name: ")
-	Enter your name: John
-	> IO.print("Hello " + name + "!")
-	Hello John
-	!
-	>
+  > var name = IO.read("Enter your name: ")
+  Enter your name: John
+  > IO.print("Hello " + name + "!")
+  Hello John
+  !
+  >

doc/site/fibers.markdown

@@ -113,7 +113,7 @@ of the `yield()` call:
 
 This prints "sent". Note that the first value sent to the fiber through call is
 ignored. That's because the fiber isn't waiting on a `yield()` call, so there's
-no where for the sent value to go.
+nowhere for the sent value to go.
 
 Fibers can also pass values *back* when they yield. If you pass an argument to
 `yield()`, that will become the return value of the `call` that was used to

doc/site/index.markdown

@@ -41,8 +41,9 @@ a familiar, modern [syntax][].
     and [an easy-to-use C API][embedding]. It compiles cleanly as C99, C++98
     or anything later.
 
-If you like the sound of this, [give it a try][try]! Even better, you can
-[contribute to Wren itself][contribute].
+If you like the sound of this, [let's get started][started]. You can even try
+it [in your browser][browser]! Excited? Well, come on and [get
+involved][contribute]!
 
 [syntax]: syntax.html
 [src]: https://github.com/munificent/wren/tree/master/src
@@ -51,5 +52,6 @@ If you like the sound of this, [give it a try][try]! Even better, you can
 [classes]: classes.html
 [fibers]: fibers.html
 [embedding]: embedding-api.html
-[try]: getting-started.html
+[started]: getting-started.html
+[browser]: http://ppvk.github.io/wren-nest/
 [contribute]: contributing.html