Sacrificed to the CRAN god

Updates for the CRAN god. Fixed random_sq() out-of-bounds possible problem, so there may be differences in sequences generated using the same seed in this and previous versions.

Fixed:

• upper bound for random_sq() correctly ignores now "*" and "-" values while computing number of letters to draw from
• removed default move/copy constructors/assignment operators for Sequence and ProtoSequence classes
• lots of technical files cleanup