REFACTOR: Most consoles and machinery now use defines for light color

This commit refactors light_color definitions for most machines and
consoles that use light_color's. Instead of having the same color repeated
over and over again, there are #defines for most of the common ones.

Some machines and other places may not use lighting defs- this is
intentional. The defines as they are, are relatively clean, and machinery
was where the bulk of repeated light definitions were. Other, special
colors, can just be defined in the same file that they are used once in.

code/modules/research/rdconsole.dm

@@ -34,7 +34,7 @@ won't update every console in existence) but it's more of a hassle to do. Also,
 /obj/machinery/computer/rdconsole
 	name = "R&D Console"
 	icon_state = "rdcomp"
-	light_color = "#a97faa"
+	light_color = LIGHT_COLOR_FADEDPURPLE
 	circuit = /obj/item/weapon/circuitboard/rdconsole
 	var/datum/research/files							//Stores all the collected research data.
 	var/obj/item/weapon/disk/tech_disk/t_disk = null	//Stores the technology disk.

code/modules/research/server.dm

@@ -181,7 +181,7 @@
 /obj/machinery/computer/rdservercontrol
 	name = "R&D Server Controller"
 	icon_state = "rdcomp"
-	light_color = "#a96faa"
+	light_color = LIGHT_COLOR_FADEDPURPLE
 	circuit = /obj/item/weapon/circuitboard/rdservercontrol
 	var/screen = 0
 	var/obj/machinery/r_n_d/server/temp_server

code/modules/shuttles/whiteship.dm

@@ -3,7 +3,7 @@
 	req_access = list()
 	shuttle_tag = "White Ship"
 	circuit = "/obj/item/weapon/circuitboard/white_ship"
-	light_color = "#CC0000"
+	light_color = LIGHT_COLOR_DARKRED
 
 /obj/machinery/computer/shuttle_control/multi/whiteship/attack_ai(user as mob)
 	user << "\red Access Denied."