api/v3 - Better support for entities defined by extensions

CRM-12922 - Allow unit-tests (e.g. api_v3_HRJobTest) to override _populateDB()

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* CRM-12922: Create data model for Job Position, etal
  http://issues.civicrm.org/jira/browse/CRM-12922

CRM-12928 fixes

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* CRM-12928: Merge contacts fatal error: Unknown column 'source_contact_id' in 'where clause (related to activity restructure)
  http://issues.civicrm.org/jira/browse/CRM-12928

CRM-12966

clean and notice fixes CRM-12966

CRM-12964, fixes for generated data

CRM-12966

CRM-12966

CRM-12520 fixes

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* CRM-12520: Add 24 and 36 month searching to relative date filter drop downs
  http://issues.civicrm.org/jira/browse/CRM-12520

CRM-12877, making report-instance api thinner

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* CRM-12877:
  http://issues.civicrm.org/jira/browse/CRM-12877

CRM-12965

CRM-12998 remove add to group from email summary report

-- CRM-12941, CRM-12863 & CRM-12824 changes made as per the comments

-- CRM-12941 handled for the point " If the onPopupClose is unspecified or is "redirectToProfile", then use the normal/old redirect URL"

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* CRM-12941: Redirect to proper contact tab after saving profile
  http://issues.civicrm.org/jira/browse/CRM-12941

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* CRM-12941: Redirect to proper contact tab after saving profile
  http://issues.civicrm.org/jira/browse/CRM-12941
* CRM-12863: Hide profile titles in HR tabs
  http://issues.civicrm.org/jira/browse/CRM-12863
* CRM-12824: Override message for empty tabs
  http://issues.civicrm.org/jira/browse/CRM-12824

CRM-12634 Simplified fix using crmURL.

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* CRM-12634: Return to home page link on upgrade finish page doesn't need to rebuild menus
  http://issues.civicrm.org/jira/browse/CRM-12634

worked on CRM-12964, more schema changes / data fixes

-- CRM-12823 created a popup for "Add New Record"