[Libvirt-cim] [PATCH 0 of 5] Build and configure cleanups

[Dan Smith]

This patch set started out as just a change to check for a new-enough
version of libvirt on the installed system.  It evolved into cleaning up
a bunch of the package checks in aclocal.m4, a couple of configure
cleanups, and a bunch of changes #include statements to account for
changes in how we include package directories (which is correct, as of
this set, IMHO).

Comments and testing on a variety of platforms would be appreciated.