2.2.71-beta-MC1710 (Test)

Change Log:

• add json<->nbt converter. add json writer. add json reader. add json parser (from string or reader).
• Move template parsing over to new internally handled json (as vanilla handling is extremely poor)
• remove silly npc-alert AI stuff, it was disfunctional and buggy
• clean up non-combat NPC-flee AI. Should resolve #101 and #120
• much reworking of npc command handling. works about as needed, small cleanup needed for guard command to re-enable horse mounting... but might just disable that stuff until I get the custom horse code working