Write "Getting Started" page.

doc/site/index.markdown

@@ -20,7 +20,7 @@ in a Lua-sized package.
  *  **Wren is clean.** The codebase is *small*, but not *dense*. It is readable
     and [lovingly-commented][nan]. It's written in warning-free standard C99.
 
- *  **Wren is fast.** A fast single-pass compiler, tight bytecode, and a
+ *  **Wren is fast.** A fast single-pass compiler to tight bytecode, and a
     compact object representation help Wren [compete with other dynamic
     languages][perf].
 
@@ -30,10 +30,10 @@ in a Lua-sized package.
 
  *  **Wren is a scripting language.** Wren is intended for embedding in
     applications. It has no dependencies, a small standard library,
-    and [an easy-to-use C API][usage].
+    and [an easy-to-use C API][embedding].
 
 [src]: https://github.com/munificent/wren/tree/master/src
 [nan]: https://github.com/munificent/wren/blob/46c1ba92492e9257aba6418403161072d640cb29/src/wren_value.h#L378-L433
 [perf]: performance.html
 [classes]: classes.html
-[usage]: usage.html
+[embedding]: embedding.html