Commandblock commands

This mod adds useful commands related to command blocks. Examples:

• /commandblock run - runs command block at a specified position,
• /commandblock runRepeating - sets commandblock to repeat, always active so it repeats the command every tick, sets it back to impulse after ticks,
• /commandblock state set <Impulse/Repeating/Chain> / get - sets or gets (shows in the chat) the state of commandblock
• /commandblock alwaysActive <true/false> / - sets or gets "AlwaysActive" value of commandblock, when it is true, the command will be run every tick (if command block is repeating (see Minecraft wiki))