Driver Developer Bundle | Development

- a few things were added to expand the possibilities of developing

- little bugfixes

Comment:
- the "DatabaseDriver" is NOT a jar-file, it's a sourcecode that must be imported into your editor!

- little bugfixes

- Sideboard + ItemFactory and Icon ItemVersion fixes

- documentation finished + examples for PageableGuis, Guis and the Sideboard

- documentation added
- ItemFactory.class and Icon.class optimized
- RotatingSkull.class implemented

- converter class in core removed (converter directly initialized in Icon.class)

- ItemFactory: SkullOwner query + set implemented --> saved in external property

- CoreDriver: the gui-system was completely reworked and a few more skulls were added to the SkullRepository.class
- DatabaseDriver: little bugfixes