Merge branch 'master' of https://github.com/02JanDal/MultiMC5 into quickmod
First work on quickmodding
Merge remote-tracking branch 'upstream/develop' into quickmod
Fix mainwindow not showing
Loads of work. Added webkitwidgets as a dependency. Almost works...
Some changes, seems to work now.

For some reason the download some times hangs, as does the webview sometimes. Remote host problem?
Some love for the welcome page
Make multi-mod-file installing work
Fixes for the downloading
Got rid of an old unused function
Icons! This time for mods.
Instance groups
Attempt to minimize the changes in the existing code
Launching of instances after installation
Prepare for dependency resolving

Open a QuickModFile from a non-QFile device.
Add parsing for a recommends and a depends field in the json files
Make stuff more user friendly
Initial dependacy resolution. Infrastructure only, no implementation.
Redoing the quickmod system. Registering of mod files and keeping them updated is currently implemented.
Merge branch 'quickmod' of https://github.com/02JanDal/MultiMC5 into quickmod
Fix building under Qt 5.1.1