imlib now has shared library support

[Mark Galassi <rosalia cygnus com>]

I have committed mods to imlib so that it now builds and installs
shared libraries.  This is my first time configuring things for shared
libraries, so I hope it's all OK.

    -> The configure.in and Makefile.in files in the subdirectories
    -> are now deprecated and I will eventually "cvs delete" them.
    -> (First I want to make sure that I did not miss anything.)

    raster> It doesn't make shared libraries, and thus does not
    raster> install them.. not a very useful thing... :)

It does now; I just had to read 1 info page and change 3 lines in
configure.in and 2 Makefile.am files.

    -> And a note to you, raster dude: can you please give me some
    -> feedback on whether this works for you?  I would love it if you
    -> were to use my new automake/autoconf stuff in your own
    -> development.

    raster> Missing shared libs... big hole :)

Now that shared libs are there, whaddathink?