Refactored hitby to be in line with TG's version.
Refactored item weight defines to a more clear naming scheme, also in
line with TG's version.
Refactored how the movement bumps are handled, ported signals to handle
them, in preparation for the movement update.
Fixed disposal hit bouncing the hitting atom on the wall.
Items do not push other items anymore if they are tiny.
* sdaf
* sdaf
* sdfa
* sadf
* sfda
* gfd
* reduce thrusters volume
* sdafsadsdaf
* sdfa
* Reduced some sound ranges and made some/more not ignore walls for loops
* health analyzers too
* ivdrip adjustment
* most tools now use play_tool_sound to have the sound played, reduced range for it
