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

Revert "Fixed issue #19 'Rake not auto completing'.  The stat command syntax that was being used was not correct. Or at least on my machine.  See man page for the stat command"

This reverts commit 83907294.

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).