can keybind to mouse buttons
moving the mouse in target mode will do freemode targetting
left click in target mode cancels, any others accept

zoom support added to the map, targetting and particles code, some things not perfect yet, deactivated for normal play


git-svn-id: http://svn.net-core.org/repos/t-engine4@802 51575b47-30f0-44d4-a5cc-537603b46e54