Modify zsh_prompt git information to trim whitespace
Modify vimrc. Changed trigger for ultisnips from <tab> to backtick
Added vim plugins, and modified vim behaviour.

Also separated files into Linux and Mac since the configurations
will be a little different for each
Corrected .gitignore to deal with files being split into two folders
Merge branch 'master' of http://github.com/JarrodCTaylor/imt_dotfiles