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

test/benchmark/string_equals.py

@@ -0,0 +1,35 @@
+from __future__ import print_function
+
+import time
+start = time.clock()
+
+count = 0
+for i in range(0, 1000000):
+  if "abc" == "abc":
+    count = count + 1
+  if "a slightly longer string" == \
+     "a slightly longer string":
+      count = count + 1
+  if "a significantly longer string but still not overwhelmingly long string" == \
+     "a significantly longer string but still not overwhelmingly long string":
+      count = count + 1
+
+  if "" == "abc":
+    count = count + 1
+  if "abc" == "abcd":
+    count = count + 1
+  if "changed one character" == "changed %ne character":
+    count = count + 1
+  if "123" == 123: count = count + 1
+  if "a slightly longer string" == \
+     "a slightly longer string!":
+      count = count + 1
+  if "a slightly longer string" == \
+     "a slightly longer strinh":
+      count = count + 1
+  if "a significantly longer string but still not overwhelmingly long string" == \
+     "another":
+      count = count + 1
+
+print(count)
+print("elapsed: " + str(time.clock() - start))

test/io/read_eof.wren

@@ -1 +1 @@
-IO.write(IO.read) // expect: null
+IO.write(IO.read()) // expect: null