Major Projectwide Restructuring

Major Projectwide Restructuring

Some major deficiencies were noticed in the previous design. Specifically,
the order of execution of steps was not customizable on a per-type basis.
This led to the problem of some types not being able to finish correctly.
Since this was obviously sub-optimal, the change was needed.

This adds a RarslaveDetector class, and many PAR2Set-derived classes. Each
of the PAR2Set-derived classes will be able to detect and fully verify /
repair / extract their type of set. When adding new sets, the new types
only need to be added to the RarslaveDetector class. Everything else is
automatic.

Signed-off-by: Ira W. Snyder <devel@irasnyder.com>