Fix: inksack color, coal type and livingentity h (or hp) to be case insensitive
Fix: issue with <name>/<quantity>/<chance>% returning empty chance value
Minor: fix livingentity & zombie data "toString()" to match required input strings
Add: allow unknown entities to be targets (enables rightclicking on a ENTITY_ENDER_CRYSTAL for example)
Add: unit testing for Drop string parsing
Release: 2.8b.308