Bug fix for the help of the chronology engine. Now the two first bubbles show the right answer.
Bug fixes for the associate engine :
First : using help while answers to vanish are in boxes used to disable these boxes forever.
Second : switching an answer from a box to another used to disable the first one forever.
Merge branch 'master' of https://github.com/horohoro/docky into horohoro-master
Merge remote-tracking branch 'upstream/master'
Refactoring chronology engine
Fix episode Ending Screen
Merge branch 'master' of https://github.com/horohoro/docky into horohoro-master
Merge branch 'horohoro-master'