Improve command line editing with VIM.
Move configuration to $XDG_CONFIG_HOME.
Add 'gman' alias.

Enable GUI version when using vimpager as man pager.
Enable extended globing.
Minor comment cleanup.
Cosmetic.
Load utility functions later (after compinit).

This make it possible to use compdef inside the definition file for
configuring how completion is handled.
Add new 'pkm' utility function.

Used for package management, with support for both Arch Linux (Pacman)
and Ubuntu (APT) distributions.
Cosmetic.
Add new 'ecd' utility function.

Execute a command from another directory.
Add 'ez' alias for 'exec zsh'.
Add 'E' global alias for pipe-edit mode.
Cleanup zprofile.

- reorder (alphabetically)
- fix fold markers
Add GTK configuration.