- replaced kcapacity widget with qprogerssbar because of cleaner api (constructor)
added quazip lib, some small cleanups
refactor small pieces of frontend, now it's bit cleaner
now the Inferfaces for message container and document container works as usual with qt with Q_DECLARE_INFERFACE and the usage of it Q_INTERFACES
refactor the interface utilization of message container on unhide function, thats not the end of refactoring that..
next refactor round on message container usage on unhide function
introduce a factory to wrap container creation
utilize message container factory
since now the interfaces have their own virtual desctructor the wrapper can destroy his wrapee
remove obsolete code