* CustomPayloadPacket Changes
commented all code for old equip packets
cleaned up custom payload key creation
added 2 new payload packet definitions for upcoming changes
* server sided recipe list
* code cleanup for recipes
* add dtor for recipe classes to fix memory leak
* forgot this part to the dtor commit
* dtor changes tested and fixed
* server side creative menu list
1. Improve const correctness in a few places (such as `Container::getMaxStackSize()` -> `Container::getMaxStackSize() const`)
2. Use C++11 varargs for `I18n::get`, `Entity::newDoubleList` and `Language::getElement`