add gentityCall_t struct for being passed along the functions in the chain
move the setting of creationtime into gentity initialization
refactor gentityCallAction related code out of g_spawn
fix the set entity-role of env_portal_surface
fix a typo

Conflicts:
	src/gamelogic/game/g_svcmds.c
reduce more printf usage in entity svcmds to reduce packets send over rcon
remove unused G_EntitiesFree
refactor targets to calltargets to be more specific later for a possible separation of call-targets and aim-targets
remove unused gentityCallDefinition parameter from act() to resemble use() more and simplify separation of act and use
finish the proper separation of use() and act()