Added golang syntax/plugin/compiler/etc
Remove vim config modifying split window behavior and size

I don't use or rely on min-size since 763e536. I don't remember the
occasion for modifying where new splits show up.
Replaced old/unused :Explore settings with better defaults
Removed old SVN Last Modified relic from inputrc

So this has been in here for a while...
Added binding to create a new window with the current CWD
Removed binding to create four-pane window layout