Alpha-0.0.8

Now with a Windows 10 binary!

Features in this release:

• Check all public method arguments for validity.
• Add Python 3.5 type annotations. (Also increase minimum Python to 3.5.)
• Remove ability to control ticks per second, preferring automatic calculation. Set Max FPS instead to limit TPS.
• Custom global event handlers. You can define a function such that it can be referenced by a shortcut name within the map editor.
• Support loading external Tiled tileset files.
• Lots of refactoring and bugfixes.