Improve cmake and GUI (#13)

+ Packaging and CI for Windows, Mac, Linux
+ Debian package, NSIS Windows installer, OSX appbundle
+ Example application using libqtk
+ Component installation for `qtk`, `libqtk`, or `collection` with cmake

resources/models/bird/bird.obj

@@ -1,5 +1,5 @@
 # Created by RapidCompact v4.3.2 | www.rapidcompact.com
-mtllib rapid.mtl
+mtllib bird.mtl
 o mesh_0
 v 290.631131412626928068 748.484123578408002686 -224.342122210487644907
 v 282.356783853739386814 751.945844816198814442 -222.136356657249308455

resources/models/lion/lion.mtl

@@ -1,16 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl Lion
-Ns 500.000001
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.800000 0.800000 0.800000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2
-map_Bump normal.jpg
-map_Kd diffuse.jpg
-map_Ns roughness.jpg
-refl specular.jpg