No collisions with launcher

Resolves #57
Split the Simulation into 2 classes.

Had to add a new gameplay constructor and modify the simulation one.
fixed the game killing bug of restarting the editor.
Merge remote-tracking branch 'origin/master' into brian-editor

Conflicts:
	PuzzlePathDimension/Menus/GameEditorScreen.cs
	PuzzlePathDimension/Menus/PauseMenuScreen.cs
	PuzzlePathDimension/Menus/ToolboxScreen.cs
Code clean up

fixed typo and renamed simulation to editableLevel in GameeditorScreen
Limit toolbar

prevents toolbar from displaying a certain type of platform or
orientation or both.
Bug Fix

Fixes #97, probably not the best way to handle it
Merge remote-tracking branch 'origin/master' into brian-editor

Conflicts:
	PuzzlePathDimension/Menus/ToolboxScreen.cs
removed "fix"

removed the bad patch that was already fixed.
Merge remote-tracking branch 'origin/brian-editor'
Remove extraneous ModelingProject1 files.