The GdaClient usage has remained unchanged except for some small API alterations and
a specific API has been defined to create and destroy databases.
The GdaError class has been renamed to GdaConnectionEvent and
can now convey not only errors but also other kind of events which have happened on a connection
The GdaConnection usage has remained by far unchanged, but some of its API have had
some alterations (finding the equivalent is trivial). The most noticeable change being that
the gda_connection_escape_string() has been removed because string escaping is
now done by a GdaDataHandler object which each
GdaServerProvider provides for each data type.