Add mappings for some more fugitive commands: Gread and Gedit
Source optional .vimrc.before

Adding an optional .vimrc.before as suggested by @spf13 in Issue #428
Merge pull request #432 from jcromero/3.0

Add mappings for some more fugitive commands: Gread and Gedit
Merge pull request #434 from mikedfunk/patch-1

Source optional .vimrc.before
Merge branch '3.0' of https://github.com/spf13/spf13-vim into 3.0