Beta 0.1.1

I really haven't figured out the whole version numbering thing yet, but this one just contains a few fixes and improvements, so, it seemed appropriate to just do a little jump.

• Dragging a project file onto the window now opens that project (or produces a yes/no dialogue if necessary)
• Replace id system of underlying engines to improve stability
• Fix to logging typos
• Added missing destroy code for the audio nodes in units
• Fixed "open, new, create, new, open" bug