Simplify parameters passing, no need to unpack (re #119)
Allow empty message (no content) when committing
Merge pull request #119 from scorphus/empty-content

Allow empty message (no content) when committing
Remove blank lines in compliance with project's standards
Implement methods to get branches in a repository (re #120 and #123)

Add a new mock method to create branches on an existing repo
Merge pull request #124 from scorphus/get-branches

Implement methods to get branches in a repository (re #120 and #123)