added debug game scene mode
Merge pull request #15 from dmedov/dev_add_game_debug

added debug game scene mode
added gun sprite with simple rotation animation
set rotation center to begin of gun
added support left rotation
added gun class sceletone
added rotation method and constructor
fix names in createBackground method
fix name
fix rotation velocity
fix gun position
fix gun position again
add rotation constraints
add method to find bullet start position
Добавлена текстура торпеды и класс Torpedo.
При нажатии кнопки "огонь" вылетает торпеда
Revert "Добавлена текстура торпеды и класс Torpedo."

This reverts commit 14a78d575f41e974e546a865e9d6d56c66837bd1.
fix constants
add getGunAngle method
add testFireMethod and correct getShootStartPoint method
refactor constructor