'unbind' on 'animationend' commented. callbacked count added.

this fixes a problem with multiple animation on the same tag with
callback passing style.
jump in.
few things.
moved on top of other dom elements (z-index 1000).
bugfixing animation problems due to callback being called multiple times.
jquery eurekaa theme added.
Revert "bugfixing animation problems due to callback being called multiple times."

This reverts commit 40145bf37672871178c9c7f2e49be3e39dc28010.
bugfixing problems wth animation due to callback being called several times.