add git not installed error message - fixes #12
Merge branch 'master' of https://github.com/Hacklone/private-bower
Additional logging around timeout call to _removePackages
Merge branch 'master' of https://github.com/Hacklone/private-bower into Hacklone-master

Conflicts:
	lib/public-repo-cache.js
Merge branch 'Hacklone-master'