Add "keep" option for those of us that think deleting branches is bad.
Add "keep" option for those of us that think deleting branches is bad.

Close #13.

Signed-off-by: DTrejo <david.daniel.trejo@gmail.com>
remove some semicolons
option to keep branches
Merge branch 'add_keep_option'
Merge remote-tracking branch 'source/master'

Conflicts:
	rotten.js