Clean up in the working directory

doc/misc/eXosip_event.txt

doc/misc/eXosip_eventCode.txt

doc/screenshots/accounts.png

doc/screenshots/audio-parameters.png

doc/screenshots/desktop-notif-voice mail.png

doc/screenshots/desktop-notification.png

doc/screenshots/gtk gui.png

doc/screenshots/several-calls.png

doc/screenshots/sflphoneDialpad_gtk_0.8.png

doc/screenshots/sflphone_gtk_0.8.png

doc/screenshots/sflphone_metal.png

doc/screenshots/sflphone_qt3_0.6.2.png

doc/uml-diagrams/sflphone-class-gui-qt.xmi

doc/uml-diagrams/sflphone-class-gui-qt06.xml.png

doc/uml-diagrams/sflphone-class-gui-server.xmi

doc/uml-diagrams/sflphone-class-gui-server06.xml.png

doc/uml-diagrams/sflphone-construct.xmi

doc/uml-diagrams/sflphone-minitone.xmi

doc/uml-diagrams/sflphone-new-daemon-arch.xmi

doc/uml-diagrams/sflphone-server.xmi