Normalize Spell Target

[tbolon]

Currently, the parser only reads the text from the target description.

It should detect the différents type used and set them.

Note that some spells have no target.

For reference, log from the parser:

[2016-11-14 03:27:36Z] INFO  [Spells.TargetParser] Statistiques sur les cibles :
[2016-11-14 03:27:43Z] INFO   - 844 Cible
[2016-11-14 03:27:43Z] INFO   - 206 Effet
[2016-11-14 03:27:43Z] INFO   - 107 Zone d'effet
[2016-11-14 03:27:43Z] INFO   - 77 Cibles
[2016-11-14 03:27:43Z] INFO   - 48 Zone
[2016-11-14 03:27:43Z] INFO   - 10 Cible ou zone d’effet
[2016-11-14 03:27:43Z] INFO   - 6 Cible, effet ou zone d’effet
[2016-11-14 03:27:43Z] INFO   - 1 Cible et zone d’effet
[2016-11-14 03:27:43Z] INFO   - 1 Zone d'effet ou cible

[tbolon]

See related issue from Schema.