Small updates

Added a bunch of small random config stuff I've been curating over a while.
The change to `.` is especially interesting.  Retaining the column allows you to rapid fire `.` for some operations.

Having spacebar toggle fold state is much more convenient than the default commands.

`,h` to kill search highlighting is more fun than `/asdlkjfsldkjflskjdfsdkfrandomcharactersnotinthefile`

And finally, I don't know how people live without `H` and `L` for beginning and end of line.

Feel free to cherry-pick any commits in here you like or let me know which ones you want removed and I can update the pull request.  I appreciate that many of these things are personal and may not be universally loved.