Merge pull request #174 from jateeter/master

added support for up and self links where (db) stored string does not
Merge pull request #175 from jateeter/master

1 - fixed bug inserted in last commit re: foreign URL
Updated ElectricPowerUsageSummary and UsageSummary

Added extended summary and clarifying descriptions.
Merge pull request #178 from MartyBurns/master

Updated ElectricPowerUsageSummary and UsageSummary
Fixed CreateUser issue
(https://github.com/energyos/OpenESPI-DataCustodian-java/issues/194 &
https://github.com/energyos/OpenESPI-ThirdParty-java/issues/119)