General D-Bus support

TpProxy — base class for Telepathy client proxy objects
D-Bus utilities — some D-Bus utility functions
Manipulating a{sv} mappingsFunctions to manipulate mappings from string to variant, as represented in dbus-glib by a GHashTable from string to GValue
slice-allocated GValues — GValue utility functions
GVariant utilities — some GVariant utility functions
Manipulating a{sv} mappingsFunctions to manipulate mappings from string to variant, as represented in GVariant by a G_VARIANT_TYPE_VARDICT
TpProxy subclasses and mixinsProviding extra functionality for a TpProxy or subclass, or subclassing it
GValueArray utilitiesFunctions to manipulate GValueArray as used in dbus-glib, despite its deprecation in GLib