Fix imac compile errors and runtime raster warnings

  Fixes not necessarily correct, just avoid the errors.

  Files with the prefix raster_ are coppies of original *.database,
  and *.param files which now includes changes nessacery for
  decoding raster data. I created seperate files for these because I
  need to merge this code upstream before I can compare the raster
  decoding results with that of the analyzer. For e.g. the map files are
  different from the original map files. So Steve needs to create a perl
  script that can propgate these changes in the map files to the map
  file of the analyzer inorder for me to do the analyzer hcana
  comparision. Once the comparision is done and we are satisifies with
  the results, we will merge the changes with the original files and
  remove the files with the prefix raster_*.

  gbeam.param now included by general.param.  No need to load
  a separate parameter set to test raster/BPM code.

  examples/MAPS/raster_jun04.map adds new detector IDs for the raster
  and BPMs as follows:

Add the following IDs to the misc elements,
BEAM
 RASTER_ID= 18          ADC
 BPM_ID= 19             ADC

In the channel section did the following modification:
 sub , plane, counter, sig
  14, 1, 13, 1 !ADC ROC#1 Sl#15 Ch#14 Fast Raster X-sync
  15, 1, 14, 2 !ADC ROC#1 Sl#15 Ch#15 Fast Raster X-signal
  12, 1, 15, 3 !ADC ROC#1 Sl#15 Ch#12 Fast Raster Y-sync
  13, 1, 16, 4 !ADC ROC#1 Sl#15 Ch#13 Fast Raster Y-signal

  THcRasterRawHit class to helps with the decoding of the raster
     signals via THcHitList class.
  THcRasteredBeam class derives from THaApparatus to handle rastered beam.
  Modify Makefile and HallC_LinkDef.h to compile new classes

Added coding for read parameters from the hcana.param file.

In the hcana.param file added the four raster channels
graster_channels = "xsync xsig ysync ysig"

Created raster_test.C script to run the analyzer for raster code testing purpose. This was coppied from the hodotest.C

add flags debugflagpr and debugflagstubs
add method THcDC::PrintStubs
modify THcDC::PrintSpacePoints
Set THcDC::LinkStubs() to only set fNDCTracks=0 and retrun when
  fNDCTracks>10 for HMS style chambers to match engine.

In CalcFptime changes for loop to use  fNScinGoodHits
In calcFptime if not a good hit ( both PMT within time window) set to -10000.
In Clear set fpTime=-10000.

  Removed not yet ready THcHodoscope::CalcBeta while merging.

Class for an Cherenkov detector consisting of two PMT's.
Fourth pull request. January 30 2014.
No need to cahnge the Map file.
New parameter hcer_tot_pmts = 2 is added to the hcana.param file
This code is for the coarse process of THcCherenkov class.
Names of all the variables are in lower case.

Variable Name   Description
phototubes      Nuber of Cherenkov photo tubes
adc             Raw ADC values
adc_p           Pedestal Subtracted ADC values
npe             Number of Photo electrons
npesum          Sum of Number of Photo electrons
ncherhit        Number of Hits(Cherenkov)

We have added a new parameter hcer_tot_pmts = 2 in hcana.param file.
It is equal to total number of PMTs in Cherenkov detector. With this
update, the THcCherenkov coarse process is complete. We have Raw adc,
pedestal subtracted adc, number of photo electrons and hits histograms
in the output root file for gas Cherenkov detector.

  Because git under Eclipse messes up soft links
  Use #include directive so desired file gets read

   Update MacOSX readme
   Add README for Eclipse usage on Linux
   Use Markdown markup for GitHub readability

Remove SConstruct softlink; rename SConstruct.py to be SConstruct
Add a README for setting up Eclipse.