Locale cleanup from the locale atlas

- Remove keys nothing references any more (meeting_murakami/growl,
  opt_home, opt_alley) in en/ru.
- An empty select "" carries no key=: drop meeting_murakami/after_wolf/
  choose_enter from the scenario and from scenarios_en.
- locale/scenarios_ru.properties: Russian scenario strings get their own
  file next to scenarios_en.

locale/en.properties

@@ -1,9 +1,6 @@
 mod_murakami_name = Murakami
 mod_murakami_desc = Murakami story line: a wild wolf prowling the town, the meeting scenario chain (wolf battle, the werewolf boss, escorting home), the Murakami character with her avatars and the meeting quest.
 
-meeting_murakami/growl = [A muffled growl came from the darkness]
-meeting_murakami/opt_home = Return home
-meeting_murakami/opt_alley = Check the alley
 quest/meeting/murakami = Meeting Murakami
 characters/player/murakami = Murakami
 quest/meeting/murakami/0 = I met a wild wolf in the city; it was trying to get into a locked house.