Alternative Linux support

[nsauzede]

This trivial PR adds basic, alternative Linux support. Okay, it's surely not a bright idea to not reuse the existing qmake framework, to add Linux support, but:

1. I tried to quickly build with qmake on Ubuntu, and failed miserably
2. qmake deps require 1GB+ installation !!

So, for a simple console application like this, I considered it to be overkill, and quickly whipped up a straight make support for Linux.

Feel free to ignore..

[DanielToby]

@nsauzede Linux support is important to me, and I appreciate the work you’ve put into making this a reality. I intend to move to cmake to remove Qt as a dependency.

I’ll happily merge any contributions toward a functional transition to cmake.

[nsauzede]

Makes sense.. I'll have a look at it, once initial support for cmake is pushed (which is not my strength ;-) )