Added C# Windows Forms project for the level editor.
Renamed Form1 to LevelEditor, removed unused usings and added a class
description to the LevelEditor form class.
Added changes to the solution and project file.
Merge branch 'testing' into leveleditor_33
Added TileType enumeration to the leveleditor project.
Added classes and interfaces related to the level for the leveleditor.
Added and started implementing level export class.
Implemented the levelexport.
Changed a runtime error with string.Format()
Created LevelImporter interface.
Added ILevelImporter to the project.
Merge branch 'testing' into leveleditor_33
Added LevelImporter class, partially implemented.
Finished implementing LevelImporter.
Added Unit test project for the leveleditor.
Added existing unit test project to the solution.
Removed unnecessary unit test file.
REALLY removed unit test file from the project.
Added ILevelReader interface to remove dependency of the file systemt.
Implemented ReadLine in LevelFileReader.