[gbrainy] (15 commits) ...Merge branch 'gbrainy_15x'

[Jordi Mas <jmas src gnome org>]

Summary of changes:

  b0140bf... Two new tips (*)
  738cd33... Logic puzzle trains (*)
  f1f1210... Unit testing and some refactorings (*)
  e8043a7... New class to store extended history (*)
  7c968c6... GameSession fixes + unit test (*)
  5c73c7f... GameManager unit test (*)
  3df8a72... Merge branch 'master' into gbrainy_15x (*)
  e93af85... Merge branch 'master' into gbrainy_15x (*)
  036a7a0... Use regular expressions & attributes to check answers (*)
  4aeb617... More work on using regular expressions for answers (*)
  63b6cbd... Refactor GameType in its own class (*)
  6264956... Move score logic to Score class (*)
  ed06632... Allow operator answer without separators (*)
  a175bf8... Five new verbal analogies (*)
  f0c954d... Merge branch 'gbrainy_15x'

(*) This commit already existed in another branch; no separate mail sent