first set of patches for activity restructuring
first set of patches for activity restructuring
worked on upgrade part CRM-12274
reminder fixes for CRM-12274
CRM-12274 - redo all changes due to bad rebase

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* CRM-12274: Merge activity tables into one unified table activity contact table
  http://issues.civicrm.org/jira/browse/CRM-12274
Merge pull request #341 from dlobo/4.4-CRM-12274

CRM-12274