GitLab

If the current directory has spaces, the script fails to change paths and fails.

auto-upadate feature will now reset the epoch so that if a user doesn't say yes, it won't ask them again for a while. fixes #1240

Fix finding git issue. http://stackoverflow.com/questions/592620/check-if-a-program-exists-from-a-bash-script

update.sh is an "sh" script, not a zsh or bash script. On platforms
which have real sh, echo does not have the -e option.

Fixes #549. Specify ZSH=$ZSH explicitly when invoking
the auto update scripts.

Make tools/install.sh and tools/upgrade.sh pretty.

Paramater substitution instead of command subsitution was being used
causing the calculation of time since last check to be incorrect.

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

Updating install process to copy your current environments PATH and adding it to the bottom of ~/.zshrc.