Add name field to Add new repo tool

We frequently have the same folder name for our git repos (/home/projectA/project.git, home/projectB/project.git etc...) so auto naming the repository seemed like a problem for us. 

I added a name field to change the repo name when adding. Some additional validation on the name field would probably be good - but I'm not much of a ruby guy so that might be better left to the professionals.