Add slime.vim: Use ctrl-c ctrl-c to send text to irb in a screen session

Start a screen session using: screen -S sess pry
This creates a session named "sess" running pry
Now use ctrl-c, ctrl-c. First time you use it will ask
for the session name, give it 'sess'. Next time will
be automatic. The text will end up in your screen.

.gitmodules

@@ -145,3 +145,6 @@
 [submodule "vim/bundle/austintaylor-vim-indentobject"]
 	path = vim/bundle/austintaylor-vim-indentobject
 	url = https://github.com/austintaylor/vim-indentobject
+[submodule "vim/bundle/jpalardy-vim-slime"]
+	path = vim/bundle/jpalardy-vim-slime
+	url = https://github.com/jpalardy/vim-slime