Untested Updates

ptMon-all.sh:
  * Fixed a bug checking outputDir
  * slight change to logging redirections

ptMon-pltDAQ.sh:
  * Added time-stamps to show progress
High Load on neutrino + DAQ plot cycles

neutrino had a high load of >66 all day on Sunday.  I'm not sure if this is
normal or not.  In anycase, I don't want to exacerbate it, so I added a load
check to the DAQ plotting program.

I also refactored the DAQ plotting program to allow for different "cycles" or
plot groups/series.  The script checks a new parameter and can run different
sets of plots, rather than all the plots all the time.  This allows one to
run different sets of plots from ptMon-all or sparate cron jobs.

Also, ptMon-all accepts and passes on the "cycle" type.  It also runs both
sites' DAQ plots in parallel.
ptMon: plotting for PVT Satellites

ptMon-pvtSatNum.sh plots used satellites
Major Bug Fix for pvtGeo plotting

Previous commit was not ready.

- Added support for CSV files to both pt-plotgen.gpt and
  ptMon-pvtSatNum.sh
- Removed some debugging lines
- Added some degugging lines
- Disabled pruning of data files by content
- Added pruning of data files by name
- Changed sorting of data files from `ls -t` to lexical sort.  This is
  valid for data extracted from SBF files and is simplier, faster
ptMon-pvtSatNum: Fix bug in pruning by filename

I keep forgetting that POSIX numerical comparisons operatores operate on
decimal integers only.  expr can handle leading zeros, so I switched to
use that.
ptMon-pvtSatNum: added "cycles" & load checking

The "cycle" feature has been copied from ptMon-pltDAQ to the Satellite
plotting script.  Also, the system load checking feature was also
copied.