Use closure-compiler's error-handling, instead of re-inventing the wheel
Change the default stream tosystem.err
Merge pull request #1 from nicks/master

Use closure-compiler's error-handling, instead of re-inventing the wheel
Update create-release.sh to use git instead of hg to assign a version number.
Adding the X-SourceMap header

This lets clients know where to find the source map.
Correcting paths to sources

This provides paths to the source files hosted by Plovr.
Merge remote-tracking branch 'upstream/master'