Fix warnings#100

Merged

zpao merged 3 commits intoreactjs:masterfrom

vipulnsward:100-fix-warnings

Dec 8, 2014

Commits on Oct 19, 2014

- Enable emitting warnings by default
vipulnsward
committed
- `File.exists?` is deprecated, changed to use `File.exist?` instead.
vipulnsward
committed
- Fixed react renderer and view helper to not throw ambiguous arguments warnings, when asserting data using regex arguements.
vipulnsward
committed