Set `options.src` to render the changed file when watching
Merge pull request #520 from kevva/watch-compile

Set `options.src` to render the changed file when watching
Add test for watched files rendering
Merge pull request #525 from kevva/watch-all-files-test

Add test for watched files rendering
Libsass: Submodule now points to sass/libsass.
Merge pull request #526 from am11/master

Libsass: Submodule now points to sass/libsass
Apply correct cflags to source files

Using -std=c++0x is sufficient to compile libsass
Merge pull request #527 from mgreter/fix/bindings-gyp-warning

Apply correct cflags to source files
Merge remote-tracking branch 'upstream/master'