Adds per faction warps functionality from #72.

Default max warps per faction is 5. It can be changed in the config.yml.
You can now use {warps} in the info board to show how many warps a faction has when you walk into their territory.
Only faction mods+ can set faction warps.

src/main/resources/plugin.yml

@@ -233,4 +233,8 @@ permissions:
   factions.showinvites:
     description: show pending invites to your faction
   factions.seechunk:
-    description: see the chunk you stand in
+    description: see the chunk you stand in
+  factions.setwarp:
+    description: set a warp for your faction
+  factions.warp:
+    description: access your faction warps