--branches and --all-branches options

[ryanmjacobs]

github-copywriter only updates the repository's default branch.

It would be a good to have a --branches option so that the user could update the copyrights on a specific branch. Or all branches with --all-branches

For example

$ github-copywriter --branch gh-pages MyRepo

or

$ github-copywriter --all-branches MyRepo

[ryanmjacobs]

Implemented in v0.1.1!

Final Syntax:

Update branch 'gh-pages'

$ github-copywriter --branches gh-pages MyRepo

Update branches 'gh-pages' and 'dev'

(note the comma used to separate branches)

$ github-copywriter --branches gh-pages,dev MyRepo

Update all branches

$ github-copywriter --all-branches MyRepo