Adding a function that will open up a ticket in Lighthouse based on the number and there being a URL in a hidden file.

Instead of using the user's standard shell, this script should be run using zsh, since that was the shell it was written for.  On my machine changes to my default shell only take effect when I log out and then long in again.  Plus, it's nice for people to be able to try oh-my-zsh out even if zsh isn't their default shell right?  :-)

Updating check_for_upgrade script to fix issue when the LAST_EPOCH file/value got corrupted. Closes #32

Revert "Added my prompt theme, with a tweak to the core oh-my-zsh to support it. My git_prompt_info function not only reports the branch and dirty status, but also whether or not the branch is ahead or behind of the remote, or both. It also switches the prompt colour from green to red if the previous command exited with a non-zero value (i.e. failed)."

This reverts commit 14a1ce80.

This reverts commit a21525ba.

Only using the contents of .ssh/known_hosts when the file exists for ssh/scp auto-completion. Closes issue #20