add Persistence module
rename extension.py to Extension.py

also implemented method to get all extensions which match the regex
extension improved it warning eLowestPriority is not used anymore

changed eLowestPriority to ePriority to be more dynamic and so the code could get simpler
alos implemented method to initialize all extensions in advance before being called
add my http lib too
add script to play whack a greg
make button playable