Lots of item-related features + chunk optimization

[Col-E]

Whats new:

• Dropped items of the same type now stack
• Mining blocks pops them out of place instead of just falling straight down
  • Sometimes due to the current collision system this does not work. This is also the same problem that causes player item attraction to not work half the time.
• Hitting an enemy knocks them back (Relative to the distance between the two, and the power of the tool)
• Attacking now offsets the tool hitbox based on the direction you're looking.
  • Before this exact scenario would have killed the zombie.
• Debug launch arg now prints the game's closing stack-trace
• Added build.bat for lazy people

Whats fixed:

• Optimized chunk operations by cutting unnecessary calls to updateLastAccessedTime() which caused a 20 second delay in world-generation and a minor runtime performance hit
  • updateLastAccessedTime() is now called only on chunk-updating methods (Removed calls when using getters)
• Cleaned up input listeners with DefaultInputProcessor
• Fixed ConcurrentModificationException that would occur when iterating enemies and one was removed

[egordorichev]

Optimized chunk operations by cutting unnecessary calls to updateLastAccessedTime()

Oh, thank you so much! I just wasn't able to find this bug!

Dropped items of the same type now stack

Did you make sure, that they don't stack with greater value, then maxStack of item? Any way, thanks for this feature. Not sure, if we need to draw numbers.. We need some kind pickup text. When player pickups item, text on his head appears.

Debug launch arg now prints the game's closing stack-trace

Good addition!

[Col-E]

Did you make sure, that they don't stack with greater value, then maxStack of item?

Whoops! Not a hard fix though. Pretty much a single extra step.

Any way, thanks for this feature. Not sure, if we need to draw numbers.

I thought it'd be convenient. It could be optional if debugging is enabled.