Completely revamped powerline configuration.

Many changes from marvin.
Missed some stuff in the last commit.
Merge remote-tracking branch 'origin/marvin'

Conflicts:
	.config/powerline/colorschemes/shell/default.json
	.config/powerline/config.json
	.config/powerline/themes/shell/default.json
	.config/powerline/themes/vim/default.json
	.config/powerline/themes/vim/tabline.json
	.gitignore
	.ratpoisonrc
	.vimrc
	.vundlerc
	.zshrc

Merged master with marvin.  They had wandered apart for too long.
Writing basic install script