refactor caljsoncheckfunctions.py:
refactor caljsoncheckfunctions.py:

 - change to a more generic way of getting delta and err values
   that hopefully will make it easier and less redundant to make
   different kinds of reports (tables, images, etc)
 - consolidates redundant calculation of "deltas"
 - use a super basic class to make it easy to lookup values uing
   the dot operator.
 - had to change the eco total function so that it returns nan if
   the 'json data' passed in is None

tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem,tobeycarman/dvm-dos-tem