Implemented piping via standard output (in Python so far):
- standard output is redirected to log-files via sys.stdout()
- selected variables can be written to standard output as JSON (see MeasurePrimary_jt.py)
- using Unix PIPE other modules can read JSON as standard input (see test_jt.py)

Preparatory steps in R:
- standard output is redirected to log-files via sink()

modified:   modules/IdentifyPrimary_jt.m
modified:   modules/IllumCorr_jt.m
modified:   modules/MeasurePrimary_jt.py
modified:   modules/Plot_jt.R
modified:   modules/PrimeRawData_jt.m
new file:   modules/test_jt.py
Implementation of JSON piping for R module:
- standard output is redirected to log file using sink()
- selected data is outputted as JSON

modified:   modules/Plot_jt.R