CMake build system completed.

What's Changed

• Fix errors by @anoraktrend in #24

• Changed build system to CMake.

• Added a PKGBUILD file to make packages on Arch and derivatives

To Do:

Make the software build without the current warnings and allow it to build with the -Werror=format-security build flags
Get the thing to do syntax highlighting.

Full Changelog: 2.3.1...2.2.25

Just for iglunix

See Changes file in root of the source directory.