merging core branch into dev. big refactor, merging packages into odata-engine-core now
Fixed issue with custom headers that were not being added properly
updating outlook services
projection and expansion support for single entities
Added tests for expand in Exchange
Added test for select in single entities
removing credentials factory impl
updating test app. removed credentials factory interface and impl
Merge branch 'dev' of github.com:OfficeDev/Office-365-SDK-for-Android into dev

* 'dev' of github.com:OfficeDev/Office-365-SDK-for-Android:
  Added test for select in single entities
Added CalendarView test
Merge branch 'dev' of https://github.com/OfficeDev/Office-365-SDK-for-Android into dev
Merge pull request #51 from OfficeDev/dev

Merging dev branch into integration branch