cleanup of filenames

src/gui/official/Account.cpp

src/gui/official/Account.hpp

src/gui/official/AnswerReceiver.cpp

src/gui/official/AnswerReceiver.hpp

src/gui/official/Call.cpp

src/gui/official/Call.hpp

src/gui/official/Makefile.am

src/gui/official/ObjectFactory.hpp

src/gui/official/ObjectFactory.inl

src/gui/official/ObjectPool.hpp

src/gui/official/ObjectPool.inl

src/gui/official/Request.cpp

src/gui/official/Request.hpp

src/gui/official/Requester.hpp

src/gui/official/RequesterImpl.cpp

src/gui/official/RequesterImpl.hpp

src/gui/official/RequesterImpl.inl

src/gui/official/Session.cpp

src/gui/official/Session.hpp

src/gui/official/SessionIO.cpp