Use ISO date format in history

See merge request allworldit/awit-zsh-superawesome!15

Use existing ~/.zcompdump file

See merge request allworldit/awit-zsh-superawesome!14

Use Zsh modifier instead of sub-shell dirname

See merge request allworldit/awit-zsh-superawesome!13

Merge individual files

See merge request allworldit/awit-zsh-superawesome!12

We no longer support ~/bin

See merge request allworldit/awit-zsh-superawesome!11

Delete obsolete code

See merge request allworldit/awit-zsh-superawesome!10

Deleted code is either no longer needed as it does not match the grml
based environment or it conflicts/overwrites grml zsh settings.

The cache directory is now in ~/.cache/oh-my-zsh

Using `ls` with a pattern fails if one of the directories is empty.

We don't have to be extremely strict on the filename format, they're
for ordering only, which the sort handles in any case.

Delete forgotten configuration file

See merge request !9

The zsh-navigation-tools plugin is no longer used.

General tweaking and a few bug fixes

See merge request allworldit/awit-zsh-superawesome!8

Bugs fixed:

  * $PATH could land up with duplicates in it
  * HIST_STAMPS was in the wrong format

Fix bug in zshrc and tighten up code

See merge request allworldit/awit-zsh-superawesome!7

The bug was that tilde expansion was inconsistent, so one of the tests
always failed. Replaced ~ with $HOME.

Add support for different releases of Kubuntu

See merge request allworldit/awit-zsh-superawesome!6

At some point the contents $DESKTOP_SESSION of changed in Kubuntu. This
change supports both the old and the new.

Delete obsolete file

See merge request allworldit/awit-zsh-superawesome!5

The prompt before this point is '%n@%m:%~%#', so the deleted script no
longer does anything useful and is a potential issue for anyone using
an alternate theme.

Delete unused gpg support again

See merge request allworldit/awit-zsh-superawesome!4