Merge pull request #4 from wuchen1106/master

Seems OK so let's merge!
Merge pull request #5 from wuchen1106/master

Build an Example working directory as a demonstration to how it works. deleted unnecessary  lines in env.sh
added alcap working directory
Update README.md
Update README.md
Update README.md
CW: Added new geometry for Ge Callibration
CW: Added G4RadioactiveDecay to QGSP_BERT & QGSP_BERT_HP options
CW: forgot to add some files; changed output_default to record more information
CW: renamed T to M in output_default and subgeo_* to match the filters in MyTriggerSvc; Changed the Ge detector geometry in subgeo_GeCallibration
Added some configure/macro files for Ge Callibration
Added some scripts for Ge Callibration, together with my result
Added two bash scripts for multi-job control
Merge pull request #12 from alcap-org/feature/WC_GeCallibration

Added Andy's target mode to PrimaryGeneratorAction together with source mode; Added configure&macro files for Ge Callibration; Added two scripts to bin/ for multi-job control; Added some scripts for Ge Callibration analysis to scripts/GeCallibration together with my results.
CW: fixed some bugs
CW: redirect output of bin/bg4sim_sub to /dev/null
CW: a mistake in previous commits
CW: changed get_ratios.C to get_peaks.C which will search narrow peaks from McTruth; modified get_eff.C with new peak numbers. width is changed to 0.025keV cause no smearing was applied to Ge response and the deposit energy peaks are still very narrow.
CW: about alcap/scripts/GeCallibration/get_*.C: improve the precision of peak ratios
CW: new results