Addition of Git and SVN scripts for Nemo

Hi, I have had the need to use Subversion whilst using Nemo. 

I found two sets of scripts one for SVN and one for Git, both of which were originally design for Nautilus. I haven’t really changed anything other than updating the README and adding one new command for SVN to show external modules (new feature). I have tested them and think I don’t see any problems but I may be wrong, especially since its not actually very nice to use SCM tools via a context menu.

Though it may be handy to add them to the current extension package? 

I don’t know procedure etc so not sure how this works. Let me know what I should do.

James