[COM_SUPPORT] make getACL() static
[COM_CITATIONS] add method parameter to match subclass' usage
[COM_REGISTER] make register html helper class methods static
[COM_RESOURCES] Only variables should be passed by reference issue
[COM_RESOURCES] make errorMessage() method static
[LIB_HUBZERO] fix a variety of php strict errors
[PLG_GROUPS_RESOURCES] make out() method static
[PLG_TAGS_ANSWERS] make out() method static