Add indentation settings to project and make indentation consistent.
Expose emulator in MainWindow and use that to load the file.
Remove declaration of non-existant function.
Use separate timers for rendering and CPU emulation.

This allows both of these loops to happen at different frequencies.
Add a menu to change emulation FPS.
Merge pull request #20 from Ventero/timers

Use separate timer loops for rendering and emulation.