Feature/specific git branch copy

This branch can copy a specific branch to server instead of current folder.
It use "git archive", has no additional dependency.
But it doesn't justify include_dir and exclude_dir.

I understand that some users may want to a copy the current folder, others may want to deploy a specific branch.
And therefore,  please redirect users who want to deploy a specific git branch to [my repo] (https://github.com/xuwupeng2000/capsitrano-scm-gitcopy).


Thank you very much.