TMUX: removes colourscheme

it was causing errors
VIM: removes regex aliases for search

This was disabling case insensitive search
Revert "ZSH: adds virtualenv support for mac os x"

This reverts commit 8ae74658268bbe6331be490b6e6888a03b7e9847.

Conflicts:
	zsh/zsh/20-env
Revert "VIM: adds vim-virtualenv package"

This reverts commit 0c3a4511c10852bcd0f2db408e1b93bee483cf5d.