Fix typo in Perl module readme
[Fix #698] Describe module in README the same as in code
Fix git log pretty format argument
Fix node-info to show right node version

Currently, node-info shows nothing if $version is different than 'none'.
Add `custom` folder plus scripts and aliases.
Activate custom scripts and customise `.zshrc`
Add `prompt_jakob_setup` file and activate prompt.
Customise `zshenv`.
Customise `zpreztorc`.
Update alias definitions.
Update alias definitions.
Enhance aliases.
Enhance zshrc to be used on other boxes as well.
Enhance zshr (add if checks for named dirs etc)
Enhance aliases
Small change to prompt_jakob_setup.
Update alias definitions.
Tidy up aliases (remove lots of systemd aliases)
Add dfc alias
Set BROWSER=xdg-open