v0.0.9-alpha

Version 0.0.9-alpha

- Add slightly more complex landmark screen for
Big Blue River Crossing.
- Fix glitch where unpausing would reset the mileage
remaining to the next landmark.
- Add routine for drawing 4-tile metatile, and refactor
oxen and wagon metatiles to use it.
- Display latest commit number on title screen. This should
help when preparing .nes files for distribution for testing.