Remove vim-perl and vim-rspec

The vim-perl bundle's github repository has gone through some rebasing
and trying to install on a new system with this repository isn't
working. I'll add it back after and lose the history.

vim-rspec, going to switch to the Thoughbot version, so that means
ditching this version.
Add vim-rspec from thoughtbots

https://github.com/thoughtbot/vim-rspec