[COM_TOOLS][LIB_HUBZERO] getResourceId() should only be called in static context
[COM_TOOLS] make more helper classes (some dupes?) have all static methods
[LIB_HUBZERO] make Hubzero_Content_Server::valid() a static method
[COM_RESOURCES] Only variables should be passed by reference
[LIB_HUBZERO] Only variables should be passed by reference
[COM_MEMBERS] make helper class methods static and other php strict error fixes