working on multi-file compiling
Merge branch 'master' into devoncarew_dart2js_multi_file
wrote more compiler tests
fixed an issue with compiling multiple files
Merge branch 'master' into devoncarew_dart2js_multi_file
review comments
Merge pull request #1280 from devoncarew/devoncarew_dart2js_multi_file

Devoncarew dart2js multi file