split sensor_touch up into sensor_player and sensor_buildable (with some code reduction), effectivly renaming trigger_buildable but merging trigger_equipment and trigger_class into sensor_player
deprecate and refactor trigger_multiple into sensor_player
deprecate remaining "triggers" by adding the env_afx subcategory (environment area effects)
create the position category and migrate everything related to it there
merge pos/info_player_deathmatch and pos/info_player_start into pos_player_spawn
remove empty spawn function for path_corner
fix accidental naming of pos_target as pos_position
replace a trigger_multiple check with its replacement entity sensor_player
patch up the defaulting of speeds in movers
previously defaults were set twice, and we got overwritten by one when switching to resetable speeds
this doesn't fix speed handling completly, but at least lets movers behave like previously again
move fallbackSpeed setting into the shared reset functions to avoid error cases and reduce code
remove some duplicate code from func_pendulum
give func_destructable its die, reset and act functions