Update to 4.7.8-rc1 dated May 20 2016

.gitignore

civicrm/CONTRIBUTORS.txt

civicrm/CRM/ACL/BAO/ACL.php

civicrm/CRM/ACL/BAO/Cache.php

civicrm/CRM/ACL/DAO/Cache.php

civicrm/CRM/Activity/BAO/Activity.php

civicrm/CRM/Activity/DAO/ActivityAssignment.php

civicrm/CRM/Activity/DAO/ActivityTarget.php

civicrm/CRM/Admin/Form/Navigation.php

civicrm/CRM/Batch/Form/Entry.php

civicrm/CRM/Case/Form/Activity.php

civicrm/CRM/Contact/BAO/Contact.php

civicrm/CRM/Contact/BAO/Contact/Permission.php

civicrm/CRM/Contact/BAO/Contact/Utils.php

civicrm/CRM/Contact/BAO/ContactType.php

civicrm/CRM/Contact/BAO/Group.php

civicrm/CRM/Contact/BAO/GroupContact.php

civicrm/CRM/Contact/BAO/GroupContactCache.php

civicrm/CRM/Contact/BAO/Query.php

civicrm/CRM/Contact/BAO/Relationship.php