Fixes "open me in new split".

<Leader>erc is was mapped to :split [location of .vimrc in my dropbox],
but that changed, so I noticed it didn't work. Now it is just mapped to
:split $MYVIMRC.
Fix issue that "open here" mapping sets virtualedit=all.

<Leader>oh is a mapping for opening a new line, starting at the same
column the cursor is at. I used virtualedit to accomplish that, but in
the old, messier version of this mapping, left virtualedit set to all
instead of turning it off afterward. Note that this is still a bit of a
messy thing because if virtualedit was on beforehand, this mapping turns
it off.
Update Teleport.vim mappings to reflect changes in that plugin.