[cppcheck] Part 1: Performance
Small style fix
[cppcheck] Part 2: Some further style fixes etc.
[cppcheck] Part 3: More perf fixes that were missed during non-verbose run for whatever reason
Removing unused var 'slotfile'
Removed 'add_bullet' from Sector, moved bullet checks into Player
Minimal code for earthflower active ability.
To activate stone form, press DOWN while holding the ACTION key.  Player does not take damage while in stone form, and ability can be use offensively to crush enemies- including those that cannot be squished.
Still needs timers set up to limit the ability, and a ton of sprite work.
Changed egg shadow draw layer so it will no longer appear in front of bonusblocks before the egg is out.
Created a new definition for Particles.

Previously, the parameters used to define particles were not very intuitive. Specifically, the angles and initial velocity were very muddled. It appeared that the angle parameters were being used to randomize both angle and velocity, but in some bizarre manner.  The new definition allows the bounds for both the actual angle of trajectory and magnitude of the initial velocity to be defined, and a random value between those bounds is what is used for each particle.

In a nutshell: the new definition uses trigonometry in a physically correct and intuitive manner.

Since the old definition is called in a manner that makes particles which look good, it has not yet been replaced. However, these calls should probably be reworked under the new definition to produce the same behavior before removing the old definition.
Brought back particles for bomb explosions
Finished up code for basic functionality of earthflower powerup.
Added missing graphic for earthflower
Added some vertical motion to the hard hat for when walking.
Stone form is heavy enough to break through bricks
Explicitly defined the angle used by Particles, used new definition for particles generated by skid and buttjump.
Generated particles need not have any randomness in either angle or velocity.
Icecrusher crushes bricks.
Crude attempt at a hat for airflower.
At least it gets the idea across.
Added missing graphic for airflower