Add generic name to pornterface.desktop, make comment more explaining, add Graphics to cetegory
Added desktop file for Plater
Added desktop file for Pronsole
Let pronterface.desktop open binary and ASCII STL, as well as Gcode
All desktop files to appear in 3DGraphics category as well
Install new desktop files
Add Pronterface AppData file and screenshots
Add Plater AppData file and screenshot
Add Pronsole AppData file and screenshot
Install AppData files with setup.py
Merge pull request #466 from hroncok/desktop

Make Linux desktop experience better by adding and polishing desktop files and adding AppData