- added FfsBuilder code and UI, but reconstruction routines for volumes,
files and sections are still not ready
- FfsOps moved to common
- QVector and QPair aren't used anymore, replaces with std::vector and
std::pair
- common classes are now independent from QObject
- next step is to replace QString with CBString from bstrlib
- files split into common and app-specific ones
- messages from parser and finder separated
- ffsEngine split into multiple classes to reduce complexity
- still no image rebuild
