Some changes in commands and main class

Revert changes in main class for checking player points, I'll do it
another time with better results.

I also changed command handling to CommandManager.java. It still need a
lot of work, e.g. /skilltree <whatever> doesn't work.

I used here new development version of ScrollingMenuSign which allow to
comparasion RightClick and LeftClick on GUI (will be used for new
/skillgui).