Post-jam fixes and changes

Hey. This post-jam patch is mostly to fix things that were either broken in the release after the 48-hour jam, or adding in features that were intended for the initial release, but couldn't quite get over the line. See changelog below:

A lot more changes/improvements and features to come in the future...

New features:

• Player healthbar.
• Player is now affected by hunger. Once hunger bar is empty, player begins losing HP.
• Player can now pick up meat and eat it.
• Player can attack animals.
• Acacia tree has middle stages of growth.
• Tree saplings added.
• More particles!
• Player can die.

Fixes:

• Giraffes and desert cat temporarily removed.
• Animation fixes.
• Stability fixes.

Known Bugs:

• Creature and player sprites sometimes flip x_scale unexpectedly.
• Cheetahs flock on top of each other.
• Slight delay on animation of death.