Be less ambiguous when a project isn't under a VCS like Git or Mercurial

[xTrayambak]

This PR fixes #1180 by:

1. Fixing the first hint to tell the user to put the package's working directory under version control AND make a commit.
2. If they still choose to ignore it and just put the package's working directory under version control without making a commit, the subsequent errors will hint at the user to make a commit.