Backport some changes from development branch:

- Made Kinsie's Test Map changes toggleable (off by default)
 - Corrected physics of various projectiles
 - Replaced textures of health items to something better looking
 - Biosludge now only has a hitbox when stuck to surfaces, to be
   more consistent with vanilla behavior
 - Some code cleanup

shaders/glsl/FizzDistortX.fp

@@ -0,0 +1,18 @@
+vec4 ProcessLight( vec4 color )
+{
+	return vec4(1.0);
+}
+
+vec4 ProcessTexel()
+{
+	vec2 coord = vTexCoord.st;
+	vec2 dist = 2.0*texture(warptex,vTexCoord.st).xy-1.0;
+	dist.x *= abs(mod(dist.y+timer*3.34536,4)-2)-1;
+	coord.x += dist.x*0.12;
+	dist = 2.0*texture(warptex,vTexCoord.st*2.0).xy-1.0;
+	dist.y *= abs(mod(dist.x+timer*5.45363,4)-2)-1;
+	coord.y -= dist.y*0.09;
+	coord.y = clamp(coord.y,0.0,1.0);
+	coord.x += timer*0.5346;
+	return getTexel(coord);
+}