Move all temporary variables off of entityclass

This is a refactor that simply moves all temporary variables off of
entityclass, and makes it so they are no longer global variables. This
makes the resulting code easier to understand as it is less entangled
with global state.

These attributes were:
 - colpoint1
 - colpoint2
 - tempx
 - tempy
 - tempw
 - temph
 - temp
 - temp2
 - tpx1
 - tpy1
 - tpx2
 - tpy2
 - temprect
 - temprect2
 - x (actually unused)
 - dx
 - dy
 - dr
 - px
 - py
 - linetemp
 - activetrigger
 - skipblocks
 - skipdirblocks

Most of these attributes were assigned before any of the times they were
used, so it's easy to prove that ungloballing them won't change any
behaviors. However, dx, dy, dr, and skipblocks are a bit more tricky to
analyze. They relate to blocks, with dx, dy, and dr more specifically
relating to one-way tiles. So after some testing with the quirks of
one-way tiles, it seems that the jankiness of one-way tiles haven't
changed at all, either.

Unfortunately, the attribute k is clearly used without being assigned
beforehand, so I can't move it off of entityclass. It's the same story
with the attribute k that Graphics has, too.

desktop_version/src/Logic.cpp

@@ -1614,11 +1614,15 @@ void gamelogic()
     if (game.activetele && !game.advancetext && game.hascontrol && !script.running && !game.intimetrial)
     {
         int i = obj.getplayer();
+        SDL_Rect temprect = SDL_Rect();
         if (INBOUNDS_VEC(i, obj.entities))
         {
-            obj.settemprect(i);
+            temprect.x = obj.entities[i].xp + obj.entities[i].cx;
+            temprect.y = obj.entities[i].yp + obj.entities[i].cy;
+            temprect.w = obj.entities[i].w;
+            temprect.h = obj.entities[i].h;
         }
-        if (help.intersects(game.teleblock, obj.temprect))
+        if (help.intersects(game.teleblock, temprect))
         {
             game.readytotele += 25;
             if (game.readytotele >= 255) game.readytotele = 255;