Allow 'feature switch' to switch by pull number using -n
Switch-by-number: Abstract logic and add to hotfix
Switch-by-number: update documentation
Switch-by-number: update man docs
Add 'iFixit' back into Ronn-generated files

Had to run 'ronn filename --organization=iFixit' to add it back
Improve flow of hotfix branch-switching logic
Merge pull request #92 from iFixit/switch-by-number

Allow 'feature switch' to switch by pull number