Merge branch 'release_5_5_0' into 'master'

CRM/CiviMobileAPI/Api/CiviMobileSurvey/GetContactSurveys.php

CRM/CiviMobileAPI/Api/CiviMobileSurvey/GetSignedValues.php

CRM/CiviMobileAPI/Api/CiviMobileSurvey/GetStructure.php

CRM/CiviMobileAPI/Api/CiviMobileSurvey/Sign.php

CRM/CiviMobileAPI/Api/CiviMobileSurveyInterviewer/Get.php

CRM/CiviMobileAPI/Api/CiviMobileSurveyRespondent/Get.php

...MobileAPI/Api/CiviMobileSurveyRespondent/GetToReserve.php

CRM/CiviMobileAPI/Api/CiviMobileSurveyRespondent/Gotv.php

CRM/CiviMobileAPI/Api/CiviMobileSurveyRespondent/Release.php

CRM/CiviMobileAPI/Api/CiviMobileSurveyRespondent/Reserve.php

CRM/CiviMobileAPI/ApiWrapper/Contribution.php

CRM/CiviMobileAPI/ApiWrapper/Event.php

CRM/CiviMobileAPI/ApiWrapper/Membership/Get.php

CRM/CiviMobileAPI/ApiWrapper/Survey/Getsingle.php

CRM/CiviMobileAPI/Calendar/Handler.php

CRM/CiviMobileAPI/Form/Session.php

CRM/CiviMobileAPI/Form/Settings.php

CRM/CiviMobileAPI/Hook/BuildForm/ContributionPayment.php

CRM/CiviMobileAPI/Install/Entity/CustomField.php

CRM/CiviMobileAPI/Install/Entity/CustomGroup.php