civicrm: 5.5.1 release

assets/templates/civicrm.shortcode.php

civicrm.php

civicrm/CONTRIBUTORS.txt

civicrm/CRM/ACL/DAO/ACL.php

civicrm/CRM/Activity/BAO/Activity.php

civicrm/CRM/Activity/BAO/Query.php

civicrm/CRM/Activity/DAO/Activity.php

civicrm/CRM/Activity/Form/Activity.php

civicrm/CRM/Activity/Page/Tab.php

civicrm/CRM/Activity/Selector/Activity.php

civicrm/CRM/Admin/Form/OptionGroup.php

civicrm/CRM/Admin/Form/Options.php

civicrm/CRM/Admin/Form/Setting/Miscellaneous.php

civicrm/CRM/Admin/Page/AJAX.php

civicrm/CRM/Campaign/DAO/Survey.php

civicrm/CRM/Campaign/Form/SurveyType.php

civicrm/CRM/Campaign/Form/Task.php

civicrm/CRM/Campaign/Selector/Search.php

civicrm/CRM/Case/BAO/Case.php

civicrm/CRM/Case/DAO/Case.php