Merge pull request #282 from totten/master-absence-model

HR224 - HRAbsence
Execute hrabsence tests
Ignore hrabsence build data
Merge pull request #285 from totten/master-absence-test

hrabsence - Enable tests. Hide build data.
HR-238 - Load real types and periods
hrabsence*.php - Update to civix 14.01 templates
HRAbsencePeriod - Fix saving of timestamps
Activity.getAbsences - Add API for fetching absences (with unit-test)

Note: At time of writing, the test for filtering by target_contact_id
fails. This appears to be an upstream limitation.