Merging in the refactored theming since we no longer rely on ZSH_THEME variable anymore
Conflicts:
oh-my-zsh.zsh
templates/zshrc.arch-zsh-template
templates/zshrc.zsh-template
I've run into the issue where a stripped down container had no Ruby
installed, which caused `hub` to fail.
Therefore I've added an extra check to verify that `ruby` is in the
commands list before setting up this alias/function.