Update Bukkit for Minecraft 1.7.10
Pulling all pending Bukkit-JavaDoc changes
Recalculate damage modifiers in event for old method. Fixes BUKKIT-5681

When we added the new API in EntityDamageEvent to give control over the
various things that modify the final damage done we caused a change in
behavior for users of the old #setDamage(double) method. Before changing
the damage would happen before the modifiers were calculated so they would
be based on the final damage value from the event. Now they are calculated
at the beginning so changing the damage does not change the modifiers.

To allow the old style and the new to coexist we now expose the vanilla
modifer calculations to the event in the form of Function objects. These
are used in #setDamage(double) to calculate the difference in the modifier
between the old damage and the new and apply this difference to the current
modifier. The difference is between the vanilla values for both damage
values and is applied on top of the event's modifier value as this should
make old and new API usage work together in a way that isn't surprising.
Add the getSlot method to BlockDispenseEvent. Adds BUKKIT-5142

The BlockDispenseEvent is missing a method to get the slot that an item
was dispensed from. Without this commit, there is no way to find out
which slot an item was dispensed from, preventing exact rollbacks of
changes to a dispenser. This commit fixes the issue by adding the
getSlot method to the BlockDispenseEvent.