Merge branch 'master' of https://dev.flarecast.eu/stash/scm/fe/all_feature_extraction
* 'master' of https://dev.flarecast.eu/stash/scm/fe/all_feature_extraction:
Changed the tag f_mag to f_stime_tau to check out whether it is defined or not using the finite function
Modified the format of empty variables
Considered NOAA AR number(s) with sunspots, but exclude NOAA plage region(s) when assigning NOAA numbers to a given SHARP data
Modified the algorithm due to the modification of the SWPC SRS staging table (distingushing between NOAA active regions and NOAA plage regions)
updated API of services
