Adding two codelabs for cds2014.

native_client_sdk/src/doc/nacldev.rst

+.. _nacldev:
+
+####################
+NaCl Dev Environment
+####################
+
+Feature Status
+==============
+
+Here is a summary of feature status. We hope to overcome these limitations
+in the near future:
+
+  * NaCl Development Environment
+
+    * General
+
+      * Supported:
+
+        * Bash (built-in)
+        * Python (built-in)
+        * Git (built-in)
+        * Make (built-in)
+        * Vim (built-in)
+        * Nano (built-in)
+        * Curl (built-in) + geturl for web
+        * GCC w/ GLibC (x86-32 and x86-64 only)
+        * Lua (install with: `package -i lua && . setup-environment`)
+        * Ruby (install with: `package -i ruby && . setup-environment`)
+        * Nethack! (install with: `package -i nethack && . setup-environment`)
+
+      * Unsupported:
+
+        * Targeting Newlib
+        * Targeting PNaCl (getting close...)
+        * Forking in bash
+        * Pipes / Redirection
+        * Symbolic and hard links
+
+    * Missing / broken on ARM:
+
+      * GCC (unsupported)
+
+  * Debugger
+ 
+    * Open issue causing it to suck CPU cycles (even when not in use).