Java Edition Beta 1.2 01

Beta 1.2_01 was released to re-add slimes, fix some of the bugs in Beta 1.2 and optimize performance.

Additions

 * Added code for a new painting, but not the painting itself
 * Slimes were re-added with a very low spawn rate

Changes

 * Optimized performance
 * Reduced spawn rates a bit
 * No more hostile mobs at night
 * Splash text on the Main Menu returned to normal. (No longer constantly shows the quote "Finally beta!")

Fixes
3 bugs fixed


 * Fixed various blocks acting really weird when placed (rails, torches, and more)
 * Fixed lighting issues
 * Added a temporary fix to get rid of chunk visibility errors.