Clean .vimrc.bundles
Remove redundant sourcing

.vimrc.bundles.local & .vimrc.bundles.fork are both sourced in
.vimrc.bundles, so remove the redundant sourcing from .vimrc
Move before config source

Place the source commands for .vimrc.before.local & .vimrc.before.fork
in .vimrc.before to reduce clutter in .vimrc
Merge pull request #451 from sbennett18/3.0

Change config file `source`ing