remove pathogen and all bundles

I'm going to give Vundle a try.

I'm also going to remove a couple plugins I never use:

* ctrlp
* qargs
set up Vundle and docs for same
add back most of my old Vim plugins

and one new plugin: YouCompleteMe

http://valloric.github.io/YouCompleteMe/
work-around YCM/UltiSnips conflict

https://github.com/Valloric/YouCompleteMe/issues/381
https://github.com/Valloric/YouCompleteMe/issues/36
https://github.com/Valloric/YouCompleteMe/issues/913
...etc