Fix project file to have relative paths for OCMock includes
Support setting "keen" property for events directly.

Will merge values from keenProperties object, "keen" in the event, and "keen" in global properties.
ignore .idea files
Update readme / bump version.
Catch 17-use-sqlite up to version 3.2.7
Manually added changes from 3.2.8 due to diff shenanigans, fixed array serialization issue in prepareJSONData