Moving the environment module to userprefs.
Changing the module name to userprefs.

Also changed the class name to userprefs everywhere.
Missed the declaration of the class in site.pp.
Get rid of the *.un~ files from being tracked.
Updating bash shell and prompt.

Added some coloring to the prompt. Displaying the full path to the `cwd`.
Also listing which git branch the user currently has selected.
Adding the zshrc file and updating the bashrc file.
Manage the zshrc file.
Merge pull request #195 from klynton/wip/userprefs-changes

Wip/userprefs changes