minor fixes:
- vcmi can play music files from archives
- converted resource_reward fields in bank_config into json object, fixes 3000 gems reward in shipwreck
- some compile fixes for minizip

git-svn-id: http://svn.code.sf.net/p/vcmi/code/trunk/@3482 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834