Update AnalyticCalc.py
Update AnalyticCalc.py

Reworked AnalyticCalc.py:
#Removed checking ID type throughout the whole file. Calcs are now being done without paying attention to undulator K.
#Changed and debugged majority of defs in this file
#Added calcs of brightness

I am not sure if these messages get transmitted to anyone :)
radiasoft/radtrack,radiasoft/radtrack