URL History Object initial commit
Changed maxOccurs on Observable_Source field in ObservableType from 1 to unbounded
Added sighting_count attribute to the MeasureSourceType for capturing the number of times the observation source has seen a given Observable
Added sighting_count attribute to the ObservableType for capturing the number of times it has been seen
Merge remote-tracking branch 'upstream/version_2.1' into issue_45
Updated existing usage of Domain object to account for name change to Domain Name object
Updated annotation on Hostname field for clarity
Merge remote-tracking branch 'upstream/version_2.1' into issue_79
Merge remote-tracking branch 'upstream/version_2.1' into issue_79
Merge pull request #278 from ikiril01/issue_79

Added Support for Capturing Observable Sightings
Updated annotation for Typed_Count field in URLHistoryEntryType to state that it is only applicable for Chrome
Renamed Typed_Count field to Manually_Entered_Count for clarity
Updated Hostname field to use Hostname Object rather than Domain Name Object
Merge pull request #241 from ikiril01/issue_45

Added URL History Object
Merge branch 'version_2.1' into issue_16