v0.1.5-alpha

Version 0.1.5-alpha

- Adds screen where player can choose to rest up to nine
days at a time. The maximum number of days to rest at one
time is set in constant REST_DAYS_MAX.
- Adds landmark screens for Chimney Rock and South Pass.
- Advances small landmark icon on traveling screen. Only
one small landmark icon has been created so far.
- Fixes bug where each day mileage was advancing haphazardly.
This was caused by the carry flag sometimes being set, throwing
off a calculation.