-----Arena creation & handling-------------------------------------------------

- creation of the arena: /sc create [arena_name]
- storing arena params to a config file
- reading of arena params from a config file
- storing of the arena blocks to schematic file - timed task
- rollback of the arena after the game - timed task
- deletion of the arena

-----Platform definition & handling--------------------------------------------

- define player platform (one center coordinate): /sc platform add [platform_name]
-> then hit the center coordinate with a wand (eg. wooden stick)
- delete player platform: /sc platform delete [platform_name]
- list player platforms: /sc platform list

-----Cannon definition & handling----------------------------------------------

- define cannon belonging to one platform: /sc cannon add [platform_name]
-> then hit the cannon with a wand
- delete cannon from this platform: /sc cannon delete [platform_name]
- list cannons belonging to a platform: /sc cannon list [platform_name]

-----Game rules implementation-------------------------------------------------

- handle the gamemodes:
  - shoot one player at a time
  - all players shoot at the same time
- activate/inactivate cannons on different platforms according to the gamemode
- scoreboard support?

-----Compass-------------------------------------------------------------------

- modify Discover Bar to my purpose, if get the source code
http://forums.bukkit.org/threads/req-discover-bar.271717/page-2#post-2547062
- compass should show the direction to each player from my position

-----Things to do when cannons are shot----------------------------------------

- report where hit (how far + possibly to what direction)