Added a resource view tree, and a custom class derived from the tree
widget to handle it
Resource viewer will now show layers as they are added and deleted
Selection now sort of works for the resource viewer...
Small clean up
Merge branch 'master' into ResourceViewAddition

Conflicts:
	MainWindow.cpp
	MainWindow.h
	TrygonLevelEditor.pro.user
Merged in the main window cleanup branch
Layer selection update now hypothetically works through a signal,
bypassing an intermediary function in main window
Signal now connects correctly
Changes
No more user file
wut
Modification of the UI
Refactored some convenience functions in Resource View
Got rid of the pesky user file
added the ignore file
The resource view will now maintain its selection
Fixed bug where currentLayer was not being nulled out after deletion of
final layer
Layer and scene size are now set right
setscenerect now happens inside the layermanager
The layer section of the resource view can now be specifically refreshed