Remove 'vim:' setting lines from PKGBUILD files.
Expand indentation tabs to 2 spaces in all PKGBUILD files.

This tab spacing seems to be popular on the AUR and I want things to be
uniform.
Fix formatting in a number of packages.

This is a series of manual formatting fixes.
Strip trailing whitespace and squeeze double-blank lines in PKGBUILDs.
TODO: Change priorities a bit.
CONTRIBUTING: Add formatting to instructions.
Move 'kali-menu' to 'kali' and 'kali-iso' to 'kali/iso'.
Add 'su'.

This is used for archtrack special roots.