Update README with two caveats for Mac builds (case-insensitive FS and linker OOM with noopt).
Fixing formatting in README.md.
Removing TODOs accidentally left in README.
Merge pull request #255 from jlebar/readme-updates

Update README with two caveats for Mac builds (case-insensitive FS and l...
Add support to helix.
change the build type of Galaxy Nexus.
Merge remote-tracking branch 'upstream/master'