Ready for spanish translation

When at startup no accounts are configured

+ stop desktop notification if an action occured before the timeout

The history takes in consideration all the outgoing and incoming calls
You can't call back every calls from history tab (those you don't hang up on)

Conflicts:

	sflphone-gtk/src/calltree.c

Saved with the preferences

Conflicts:

	sflphone-gtk/src/Makefile.am
	sflphone-gtk/src/calllist.h
	sflphone-gtk/src/calltree.h
	sflphone-gtk/src/menus.c

Comments every methods in every header