20.9.18 
updated PTU demos to support MultiHarp 150
updated DOC to most recent tag dictionary, removed links to pq forum
PHU demos remain unchanged

15.2.19
adapted C demos to compile under Linux also
updated DOC to most recent tag dictionary

26.3.19 
updated LabVIEW demos, PTU demo was buggy

3.12.19
updated C++ PTU demo, oflcorrection was not initialized to 0

6.5.21
updated all PTU demos and documentation to cover the new MultiHarp 160,
basically generalizing from MultiHarp 150 to 
Multiharp 150+160 = MultiHarp
updated DOC to most recent tag dictionary

15.3.21
updated PTUdemo.cc for compatibility with recent compilers



