PlayerEx

*Fixed death screen openGL error due to overlay.
*Fixed applying/removing modifiers to attributes that influence other attributes not influencing the other attributes:
+Added new registry: modifier registry. Similar to adders, this allows devs to hook into when a modifier is applied to an attribute and run extra code (such as applying the same modifier to other attributes).
+Added TriFunction functional interface (needed to keep the modifier registry tidy/efficient).
+Added helper methods Util#apply to allow for attribute modifier values to be converted to diminishing returns values.
*IPlayerAttributes#applyModifier and removeModifier now return IPlayerAttributes (allows for chaining).
+Incremented version to 1.1.4.