Merge pull request #2 from boskee/master

Updating #2
Merge pull request #3 from boskee/master

Updating #3
Cleanup
Added screenshot to README.md
Merge branch 'master' of git://github.com/Jimx-/Minecraft
Merge branch 'master' of git://github.com/avelanarius/Minecraft
need place for brainstorming/ideas etc. related to project, so we can cooperate (IRC/forums/Reddit?)
Add formatting to README.md
Add formatting to README.md (2)
Merge branch 'master' of git://github.com/avelanarius/Minecraft
Readme tweaks
Readme fix
Merge commit '140e4880a1944d73ea226c5bad127db363b7e9b4'
Merge commit '82290dddfd7e873ff36b9c3bdbe9084efeae6d7c'
Added new proposition to places for ideas.
Allow dragging items in inventory. Center selected_item_icon on the mouse position
Merge branch 'master' of git://github.com/avelanarius/Minecraft
new plants: jungle and birch trees, cactus.

Implemented Jungle and Birch trees, added Cactus, made land generation
to plants a bit more selective
Added attack_power, used (for now) to calculate block destruction
Started moving key bindings to config file