gh-pages branch needs a build in case the trees.json changed
Update the NPM description

Fixes #968
Merge branch 'build-gh-pages-binaries' of git://github.com/johnjbarton/traceur-compiler into johnjbarton-build-gh-pages-binaries
Fixup package.json
0.0.40
Commit the generated code to gh-pages.
Rebase.
Recompile
Recompile
Update built files after merge
Rebuild traceur-runtime
Update runtime and commit binary
Rebuild
Recompile
Merge and rebuild
Rebase; commit binaries for 0.0.39
Rebase; commit binaries for 0.0.40