Merge pull request #3 from bartoszmajsak/master

Added coloring for build status
Preserve mvn's exit status.

This enables things like:
  $> mvn install && echo 'YAY!'
Merge pull request #5 from adam-rightshift/preserve_status

Preserve mvn's exit status.
Consolidated checks for build success/failure, warnings, added [WARNING]
Merge pull request #6 from joelpurra/consolidate-checks

Consolidated checks for build success/failure, warnings, added [WARNING]
Extracted colour names and changed info to grey

- Colours as variables
- Changed info from green to grey
Merge pull request #8 from ingwarsw/master

Extracted colour names and changed info to grey