refactor: switch to Plugin syntax for Vundle

fixes #11
chore: remove date mapping because it makes typing "d" slow
plug: recent first for Startify
plug: startify recursive dir enabled
plug: add QFEnter, making QuickFix more palatable
spell: add more spellings
fix: remove last remnants of Bundle command
feat: ddate back again thanks to @ethanmuller
Merge remote-tracking branch 'his/master'

mostly, Bundle -> Plugin naming
mostly restored my config, except vim-slime

K mapping
various ruby/rails binding.pry and focus/unfocus specs
add many textobjects and more plugins