Add methods to check for conflicting enchantments. Adds BUKKIT-3830
Allow fishing success rate to be adjustable. Adds BUKKIT-3837
Spigot POM Changes.
Measure the duration of the entire timings run.
Improved Timings System

Enables "Timings on Demand" so you can enable/disable timings without server restart.
Tracks timings on sync events a plugin registers (Single and Repeating)
Tracks how many ticks a timed area has caused the server to lose due to taking too long.
Enables automatically pasting to paste.ubuntu.com so you can quickly review the results on aikar.co/timings.php
Add nag for bad plugins.
Refactor conversions from LazyMetadataValue into abstract base class

Implementing MetadataValue interface is significant work due to having
to provide a large amount of conversion stub method. This adds a new
optional abstract base class to aid in implementation.

Includes comprehensive unit tests including a sample adapter class, and
all existing metadata tests pass.
Clean up whitespace.
Substantially more comprehensive unit tests.

Check all the interesting implementation details in metadatavalues
which were never tested before, as well as making sure we document
things thoroughly.
Libkit JavaPluginLoader and PluginClassLoader Changes
Libkit POM Changes
Add Custom Events

Conflicts:
	src/main/java/org/bukkit/event/player/PlayerItemDamageEvent.java

Conflicts:
	src/main/java/org/bukkit/event/player/PlayerItemDamageEvent.java