Changed reentrant settings of some devices to make driver more performant if more than one device is controlled from same PC

Added MDO30 driver + Corrected small bug in PossibleBooleanList of all attributes: This list needs to be saved per channel and not one for all (hopefully it works now)

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

Fixed some bugs + After each cmd a query of all related parameters is done instead of only the most recent one

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 readout cmd for Tek3000 osci
- Added Tektronix base class
- still needs some cleanup

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

and Vis are writable now