* dbus-1.pc.in, dbus-glib-1.pc.in: rename these from
dbus-1.0.pc.in, dbus-glib-1.0.pc.in. As these change with the
parallel install API version, not with the D-BUS package version.
* HACKING: move some of README over here
* README: updates, and document API/ABI policy
* configure.in: reindentation