Directional lighting tweaks (#1833)

changes:

Flashlights now default to LIGHT_WIDE directional lighting.
Glowsticks, Lamps, Flares, and Slime Cores use LIGHT_OMNI.
Maglights use LIGHT_NARROW.
Heavy-duty flashlights use LIGHT_SEMI.
EVA suits default to LIGHT_WIDE.
Lanterns use LIGHT_OMNI, as well as now having a more appropriate light color.
Floodlights use LIGHT_WIDE, as well as having a more appropriate light color.
Synthetics default to LIGHT_WIDE. (including drones)
Added some predefined light_wedge values to the lighting defines file.
Fixed some bad angles that screwed up north/south lights in some cases.

code/modules/mob/living/silicon/robot/robot.dm

@@ -13,6 +13,8 @@
 	mob_swap_flags = ROBOT|MONKEY|SLIME|SIMPLE_ANIMAL
 	mob_push_flags = ~HEAVY //trundle trundle
 
+	light_wedge = LIGHT_WIDE
+
 	var/lights_on = 0 // Is our integrated light on?
 	var/used_power_this_tick = 0
 	var/sight_mode = 0