Bukkit

- Added is / is not option to True/False branches. Example: while not air front - would execute while branch as long as there is not air block in front. - Added function arguments (three), function variables (ten), return value (one). - Added math blocks to perform operations with variables. - Modified signs to include variables. - Logic commands should execute much faster now. Speed value of robot mainly controls commands like move, dig, not if, math etc.