Bug fixes

[GummiA]

váá´mörg bug sem er verið að laga:
* SSP chunk memory leak
* Mineshaft density (half now)
* Increased stronghold count to 3 per map instead of one
* Furnace tile entity crash
* Crafting bench ghost items
* Vines (and leaves) crash in nether
* Use item animation in SMP (blocking and eating)
* Blocking in SMP
* Sprinting with right-click or sneaking
* Added some blocks to creative mode
* Fixed dropping items
* Nothing can be eaten in creative mode
* Enderman client-side problems
* Chicken and cow drop burned food
* Squids drop exp
* 1.7 worlds should get structures
* Farmlands rejecting melon and pumpkin seeds
* Bonemeal on melons and pumpkins
* Bonemeal on mushroom only works on dirt or grass
* Added item drops for cracked and mossy smooth stone brick
* Adjusted fog strength at low positions