Add Assimp dependency and corresponding cmake lines; add assimpwrapper class in core/
Revert "Add Assimp dependency and corresponding cmake lines; add assimpwrapper class in core/"

This reverts commit 50ff239f9506ebea7cf2fb3e92f4ee9e7324ba9d.
Revert "Revert "Add Assimp dependency and corresponding cmake lines; add assimpwrapper class in core/""

This reverts commit adf2205cc6d4e3b01d1ba8bd4f968b98b65b79fb.
add 3rdparty folder to gitignore
ref #10 add first methods to assimp wrapper
ref #10 finish AssimpWrapper::parseNode
ref #10 add parseMeshes method
ref #10 finish basic wrapper; make painter use assimp::wrapper
ref #10 add collada sample file and change camera to look at it
Merge remote-tracking branch 'origin/master' into assimp_import_wrapper_10

Conflicts:
	apps/cgsee/painter.cpp
Add Assimp 3.0 to Dependencies
ref #10 add abstractmodelloader class
ref #10 add abstractmodelloader as superclass to assimploader (formaly assimpwrapper)
ref #10 rename ObjIO to ObjLoader; make ObjLoader subclass of AbstractModelLoader
Merge remote-tracking branch 'origin/assimp_import_wrapper_10' into GUI_FileExplorer
ref #10 create class abstractscenepainter between abstractpainter and painter
prepared NavigationHandler for using Loader / Painter
Merge remote-tracking branch 'origin/assimp_import_wrapper_10' into GUI_FileExplorer
fixed using a fix system depend path
ref #10 make all***ableTypes return QStringList