Use `chalk` for colours

https://github.com/sindresorhus/chalk
Update readme.md, fixing a typo
Merge pull request #48 from jbdeboer/patch-1

Update readme.md, fixing a typo
Update readme.md
Update readme.md
minor tweaks
Close GH-47: Allow interactive commands to be used.
0.6.0
remove deprecated grunt util
add travis
0.6.1