Generic Station & System Name

Makes the name of the starsystem and station generic such that it can be modified in global.dm and replace the strings where it is used. This won't have an effect on Polaris itself, but makes changing the name much more simple for forks. Using string concat constants on the advice of Psi.

code/modules/client/preferences_factions.dm

@@ -22,7 +22,7 @@ var/global/list/citizenship_choices = list(
 
 var/global/list/home_system_choices = list(
 	"Sol",
-	"Vir",
+	starsys_name,
 	"Nyx",
 	"Tau Ceti",
 	"Epsilon Ursae Minoris",