Added functions get/set_block_command() and get/set_command_block_name()
Check if parameter 2 in set_block_command is a string
set_command_block_name needs a string
Added command minecart support, fixed docs and null
Merge origin/master
Moved CommandMinecart functionality to entity_spec
Merge pull request #209 from PseudoKnight/master

Added functions get/set_block_command() and get/set_command_block_name()