If no zsh files present then do not give error
Removes whitespace stripping

This was messing up things so have taken it out

Revert "Strips trailing whitespace when saving"

This reverts commit 82c4cc6c14306954eb4880e37521737ee21f0c4f.

Revert "Strips whitespace from vimrc"

This reverts commit d2476b35b0957d2e3c5747e3921b1141246b36c4.
Moves zsh directory to bak
Adds basic prompt
Strips out unrequired boilerplate

Main improvements:
    * much shorter fpath
        * less completion but faster
    * rbenv init now uses --no-rehash argument