modulrized the util class
reenabled import bean with basic data
switched back to wattage_updater for display
switched back to old json library syntax for usage on pi
fixed formula
moved back to availible 1.1.5 version of securityobjects
Revert "moved back to availible 0.1.5 version of securityobjects"

This reverts commit cc642bd3b2982a67249928f516814086b1f5ed7c.
fixed graph bean to display data of last 12 hours
retry delay, update speed 2s