Added sbf2PVTSat

PVTSatCartesian block are the only block that contains a breakdown of individual
satellites used for PVT solution.  This script searches the sub-blocks for each
PVTSatCartesian block and counts the number of satellites by constellation and
reports the total number of each constellation's satellites used.
Added GPS performance report (incomplete)

I added a call to sbfAnalyser that can run a predefined report.  This does not
work, though, as it is an X11 client application and requires an X server.  I
have decided to abandond that, for now, but it is possible to fix that later,
if I want, so I'm commiting it now anyway.
Better Fix mkRINEX... for Kenkyuto Move

Now, mkRINEX... does the right thing for any SBF source file.  If the file
from a time before the move, it uses the RnHut output directories; if it
is from after the move, it uses the Kenkyuto output directories
Turned off extra debugging

Since the Kenkyu-tou move changes have been tested, I'm just commenting
the debug lines that I added.
Added 3-day combined hybrid RINEX capability

mkRINEX+CGGTS.sh: new feature produces RINEX files that include a bit
of data from the previous day and the next day.  This was Nick's idea
and it produced improved continuity in the PPP results before we found
the smoothing option.  I've added it because I think we will use it
for in-house PPP, when we do that.
Short update to help text
Merge branch 'dev' of https://github.com/PaulDeStefano/pythonsamples into nu

Conflicts:
	mkRINEX+CGGTTS.sh

Had to manually merge PVTSat and 3-day RINEX feature.