Auto build of PODD

	modified:   CMakeLists.txt
	modified:   cmake/HCANAConfig.cmake.in
	modified:   external/CMakeLists.txt
	modified:   external/PODD.CMakeLists.txt
	modified:   src/CMakeLists.txt

	new file:   external/CMakeLists.txt
	new file:   external/PODD.CMakeLists.txt
	modified:   src/CMakeLists.txt

added multiplicity variable to THcShowerPlane.cxx/.h, and fixed multiplicity defined in THcCherenkov.cxx (#372)

Modified Hodoscope and ScintillatorPlane  classes for new time calibration method.

	modified:   README.md
	deleted:    src/HallC_LinkDef.h

This repo along with hallac_evio and analyzer all have "cmake" branches
with complete cmake builds.

  If Load is called with a run number, but the first non blank/comment
  line encountered is not a run number or range, print a warning message.

1) Created Coincidence Time Physics Module
2) Created method to get coin. trig times in the THcTrigDet.cxx class

In Setup : Set name of histogram to include initial of spectrometer
   that it belongs. Each event in EstimateFocalPLaneTime the histogram
   is fill with the scintillator times so that a cut can be placed
   to throw out bad scintillator times relative to the mean of
   all scintillator times.

Change fBCM_Name to vector of strings .
Fixed memory leak when it was array of char.

Elminiate "void" in THcHodoscope::EstimateFocalPlaneTime( void )

In Process add if statement to be sure that hitcounter is
  greater than zero and less than total number of paddles
  in the plane.

THcSpacePoint
  1) added fSetStubFlag which is intialized
     to kFALSE in constructor and set to kTRUE
     when SetStub is called.
   2) added method GetSetStubFlag which
      returns fSetStubFlag.

THcDriftchamber
   1) In ProcessHits increased fHits reserve to 40
   2) In FindSpacePoints use fSpacePoints->Delete();
   3) In LeftRight ,only SetStub if the Stub is fit.

THcDC
   1) In LinkStubs
      a) only link stubs if number of total spacepoints <10
      b) only link stubs if both spacepoints have SetStubFlag true

THcDCHit.h
   1) In constructor initalize fLR to 0

THcDCTrack.cxx
   1) AddSpacePoint check if fnSP < 10

  Will correct sync problems in d(e,e'p) run coin_all_3302.dat and SIDIS
  run coin_all_3621.dat.

To correct 3621, run slipstudy.C as is.  To correct 3302, change kTRUE
to kFALSE in the line:

synccheck->SetResync(kTRUE);

  THcTimeSyncEvtHandler is a toolbox to study and correct various
  synchronization issues.
  It checks that the timestamp in the FADC250s agrees with the timestamp
  in the TI modules.
  It also checks if the event counter in the 1190 modules agrees with the
  event counter in the TI modules.
  It can be used to correct the 1190 synchronization problem we have
  seen in ROC3 by writing out a corrected data file.  See the next commit
  for an example of how it is used.

1) Have time cut on TrigDet reference time for TDC and ADC,
       to select reference time from multiple hits

2) Have time window to select best TDC or ADC reference time subtracted
   time  hit for each channel.

In LeftRight method when using SmallAngle Approximation and
 additional condition that the wires in adjacent plane have to
 be within 0.51cm.

Add call ConvertTimeToDist in SubtractStartTime method

Modify so default starttime is -1000.

Modify so if no hits in scintillator then EstimateFocalPlane is not called.

Fix type in GetSp2_ID()

THcDriftChamberPlane

  1) Remove subtraction of hodoscope starttime from ProcessHits
    which is called by THcDC::Decode.
  The hodoscope start time is determined in hodoscope Decode
   which is called after THcDC::Decode. So drift chamber
   was using the starttime from the previous event.

   2) Create method SubtractStartTime which is called by THcDC:CoarseTrack

THcDriftChamber
    1) Move fChambers[ic]->ProcessHits() to CoarseTrack
    2) Before looping through fChambers[ic]->ProcessHits() in CoarseTrack
        loop through all planes and call fPlanes[ip]->SubtractStartTime()