added destroy item callback handler
fixed update data so that floats and non-neg numbers can be sent
added method to store values at an offset of a uint32 field when a char is created
added inventory to functional subsystems
Merge branch 'master' of github.com:jcclinton/wow-emulator

* 'master' of github.com:jcclinton/wow-emulator:
  added destroy item callback handler

Conflicts:
	src/handlers/inventory.erl