StatusTimeSeries; ConfigFactory Updates

Added StatusTimeSeries based on Offset class; updated configfactory for
statustimeseries and also curvefunction; minor change in units map
strings.
Updated configfactory for statustimeseries and also curvefunction; minor change in units map strings.
collapsing some repeated code into private method getConfigDouble
Merge branch 'jim-stability-1.1' into stability-1.1