Added SDJB_htmlPrizeWheel

Added SDJB_htmlPrizeWheel and updated the SDJB_htmlBase
once again to work smoothly with it.

this makes giving items far easier by long way script:
$gameParty.gainItem($dataItems[3], 1)  to more simplyfied
rpg.giveItem(id, amount).

amount is 1 by default, so can be ommitted.
read helpfile how to use, as giveWeapon and giveArmor is
also possible :)