Revamp the announcements system.

This commit transforms the announcements system in the following way:
- announcements.yml makes it easier to add missing nodes and remove
  obsolete ones. This way, users don't have to delete their previous
  announcements-file to get the new keys.
- Color codes are supported in the fact that when an announcement
  message is "set()", the string value has all of its &-symbols
  translated.
- No need for a defaults-file, because the enum is very easy to
  compile into a YAML file.

resources/plugin.yml

@@ -1,7 +1,7 @@
 name: MobArena
 author: garbagemule
 main: com.garbagemule.MobArena.MobArena
-version: 0.95.5.18
+version: 0.95.5.19
 softdepend: [Multiverse-Core,Towny,Heroes,MagicSpells,Vault]
 commands:
     ma:

resources/res/announcements.properties

@@ -1,51 +0,0 @@
-ARENA_START=Let the slaughter begin!
-ARENA_END=Arena finished.
-ARENA_DOES_NOT_EXIST=That arena does not exist. Type /ma arenas for a list.
-JOIN_PLAYER_JOINED=
-JOIN_NOT_ENABLED=MobArena is not enabled.
-JOIN_IN_OTHER_ARENA=You are already in an arena! Leave that one first.
-JOIN_ARENA_NOT_ENABLED=This arena is not enabled.
-JOIN_ARENA_NOT_SETUP=This arena has not been set up yet.
-JOIN_ARENA_PERMISSION=You don't have permission to join this arena.
-JOIN_FEE_REQUIRED=Insufficient funds. Price: %
-JOIN_FEE_PAID=Price to join was: %
-JOIN_ARENA_IS_RUNNING=This arena is already in progress.
-JOIN_ALREADY_PLAYING=You are already playing!
-JOIN_ARG_NEEDED=You must specify an arena. Type /ma arenas for a list.
-JOIN_TOO_FAR=You are too far away from the arena to join/spectate.
-JOIN_EMPTY_INV=You must empty your inventory to join the arena.
-JOIN_PLAYER_LIMIT_REACHED=The player limit of this arena has been reached.
-JOIN_STORE_INV_FAIL=Failed to store inventory. Try again.
-LEAVE_PLAYER_LEFT=You left the arena. Thanks for playing!
-LEAVE_NOT_PLAYING=You are not in the arena.
-PLAYER_DIED=% died!
-SPEC_PLAYER_SPECTATE=Enjoy the show!
-SPEC_NOT_RUNNING=This arena isn't running.
-SPEC_ARG_NEEDED=You must specify an arena. Type /ma arenas for a list.
-SPEC_EMPTY_INV=Empty your inventory first!
-SPEC_ALREADY_PLAYING=Can't spectate when in the arena!
-NOT_READY_PLAYERS=Not ready: %
-FORCE_START_STARTED=Forced arena start.
-FORCE_START_RUNNING=Arena has already started.
-FORCE_START_NOT_READY=Can't force start, no players are ready.
-FORCE_END_ENDED=Forced arena end.
-FORCE_END_EMPTY=No one is in the arena.
-FORCE_END_IDLE=You weren't quick enough!
-REWARDS_GIVE=Here are all of your rewards!
-LOBBY_CLASS_PICKED=You have chosen % as your class!
-LOBBY_CLASS_RANDOM=You will get a random class on arena start.
-LOBBY_CLASS_PERMISSION=You don't have permission to use this class!
-LOBBY_PLAYER_READY=You have been flagged as ready!
-LOBBY_DROP_ITEM=No sharing before the arena starts!
-LOBBY_PICK_CLASS=You must first pick a class!
-LOBBY_RIGHT_CLICK=Punch the sign. Don't right-click.
-WARP_TO_ARENA=Can't warp to the arena during battle!
-WARP_FROM_ARENA=Warping not allowed in the arena!
-WAVE_DEFAULT=Get ready for wave #%!
-WAVE_SPECIAL=Get ready for wave #%! [SPECIAL]
-WAVE_REWARD=You just earned a reward: %
-MISC_LIST_ARENAS=Available arenas: %
-MISC_LIST_PLAYERS=Live players: %
-MISC_COMMAND_NOT_ALLOWED=You can't use that command in the arena!
-MISC_NO_ACCESS=You don't have access to this command.
-MISC_NONE=<none>