Libvc

This version correctly parses vCard version 2.1
files, allowing Microsoft vCard files to be read
properly. Searches and comparisons of type names
and parameter names are now case insensitive.
The build process now produces shared libraries
as well as static libraries.

Parsing of parameters is now performed properly, and they are stuffed
into the "name" and "value" fields of the "vc_param_component"
structure. The "str" field has been removed as a result of this
(because "str" was only a silly hack to begin with). A bug in
fprintf_vcard which prevented vcards from being printed has been
fixed. There is now a libvc.spec file for Red Hat Linux; RPMs will be
created for each release from now on.

This is the same vCard library that was built with previous releases of rolo. However, all occurrences of `vcard_' have now been shortened to 'vc_'. Also, the header file is now 'vc.h' instead of 'vcard.h'. The next binary releases of rolo and mutt_vc_query will be built with libvc. The next source releases of rolo and mutt_vc_query will have libvc as a dependency. The vc(3) man page is not finished yet.