Add resources
Remove some unused functions in screen module
Fix starfield print logging
Delete old data includes
Put resource loading data into progmem
Put filename strings into progmem
Disable event counter for now

Saves program space
Use progmem for printf strings

Saves close to 1 KB of RAM.
Reduce amount of logging in starfield

Print a message per starfield tile rather than per tile line.
Remove VRAM allocation function

Allocate first bank for loaded image data and second bank for generated
starfield data.
Fix sprite assignments in Screen