some cleanups, add missing destroy calls, fix incomplete destroy calls, small speedup
unlink some cyclic dependencys to get garbage collection working
add support for cyclic garbage collection to eTimer and eSocketNotifier class, add simpler method to set a timer callback.. or remove.. instead of timer.timeout.get().append(func).. or .remove(func)... now it is possible to do timer.callback.append(func)... timer.callback.remove(func) (the old method still works..but is now deprecated)
implement proper 'destroy' functions in Converter
fix import
cleanup some imports
fix caching
suspend timers when all renders are hidden
some minor speedups using caches and more selective updating
add some new (currently unused) source/renderer based elements
add new skin stuff