* added frenzy spell
* repaired order in stack queue in case a unit has waited (it should work correctly now)
* added spell positiveness info, positive spells cannot be cast on hostile stacks and vice versa
* randomizing spells in towns
* fixed reading forbidden structures
* support for heroes starting in town garrisons
* hopefully fixed problems with wrong town defs (village/fort/capitol)
* moved CSpellHandler.* to VCMI_Lib (project files must be updated)
* redone reading spell info
* added missing features to the fort screen
* minor improvements
* partially done mage guild screen