Added MSO64 (not completely tested) and had to make some basic changes because MSO64 has a slightly different cmd structure

TRied to clean up a bit (not 100% finished): Changed the inheritance structure; everything inherits now from a Tektronix base class (which can be used for 3ks)

Added class for MSO64 osci (working but needs more testing) and some files for TKDPO7k (not working / finished)