Adding port of my personal theme
Adding screenshot to giddie theme.
Using arithmetic brackets for numerical comparison, instead of conditional brackets.

Using == with [[ is a string comparison, not a numerical comparison as it ought
to be.
Fixing prompt CWD when in home directory
Toning down the SPROMPT colours, which are a bit too much
Adding colour to the completion indicator
Slight performance tweak to giddie theme
Moving theme from old themes directory to prompt/functions
cdable_vars has been annoying me
Fix a typo in git documentation
[Fix #335] Prevent rbenv from hashing gems at startup
Fix auto completion for SSH hosts when saved with a non-standard port
Check for the existence of .zcompdump before compiling
[Fix #338] Remove vi jk and kj bindings
[Fix #348] Clarify how GNU utilities are wrapped
Update external completions
Update external syntax-highlighting
Add an alias to ammend a git commit, including the message
[Fix #329] Add giddie theme
[Fix #347] Move 'users' from tag-order to group-order