Fixes falling through to the gpm usage text on plugin exit
Merge pull request #25 from hybridgroup/graceful_plugin_exit

Fixes falling through to the gpm usage text on plugin exit
Add local vendor support
Add gpm exec for executing in the context of a vendored GOPATH
Update README
Auto detect .gpm file on gpm install
Add the ability to specify local source directories in Godeps
Update README
Merge branch 'source_local_project' into local_vendor_and_exec

Conflicts:
	bin/gpm
Remove verbose output