Allow system-wide install and don't require root in pkgbuild

[icewind1991]

• allow reading the config file from a system wide location (so it can properly be globally installed)
• don't require root in pkgbuild
• don't install config files to a users folder in pkgbuild
• install the config file to a system wide location
• grap the source from git in the plgbuild instead of having a tar in the repo

For the source you'll either want to tag a release on github and use the release tar as source, or change the pkg into a -git package and have the pkgver calculated from git commit hash

To test you'll need to edit the source from

source=("git+https://github.com/domschrei/krunner-symbols.git")

to

source=("git+https://github.com/icewind1991/krunner-symbols.git")

[domschrei]

Thank you, this is really helpful!

Concerning the config files, I'm about to implement some more abstract configuration management by using KConfig. Yeah, what I did with the pkgbuild and .tar was some tinkering and trying what works and what doesn't. When I'm happy with the config management, I'm going to tag a first release and upload to AUR.