allow feeding on horses
allow INFECTING horses and making them undead!
fix holy water glitching out (issue #66) by cancelling the event and delaying the inventory change
add a configurable blood trading percentage (0.5 or 50% brings it in line with normal hitting transfer)
make offering blood take it from health pool on humans, instead of food (humans tend to be harmed by losing blood)
replaced spaced indenting with tabs on recent change
rearranged infect horse to be more like infect player code, also fix npe on arrows
Merge pull request #73 from intangir/master

I added some new features (related to horses) and fixes (holywater)