Some minor changes in the instance model and control
Merge https://github.com/Forkk/MultiMC5

Conflicts:
	gui/mainwindow.ui
Don't bother installing Qt 5 dependencies. Leave it to the user. Maybe we'll make a debian package or something later.
add first iteration of the integrated browser
Merge branch 'master' of http://github.com/Forkk/MultiMC5
implement desktop shortcut creation. windows code not tested.
Added SigList class.
Started reworking the instance system.
Merge pull request #1 from mortu/master

Successfully build using clang 4.1 on OSX
Merge branch 'master' of github.com:Forkk/MultiMC5
Merge branch 'master' into inst_rewrite
Merge branch 'master' of http://github.com/Forkk/MultiMC5
Switched to BundleUtils and added OS X support.
Install plugins in the right dir.
Merge branch 'master' into inst_rewrite
Added InstanceLoader and InstanceType headers.
Implemented instance loader.
Implemented Instance
Implemented loadList() stuff.
implement commandline parsing