move config parser to a convenience library

Create a new directory for convenience librariers that can be shared
between compositor components and clients.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
diff --git a/configure.ac b/configure.ac
index 60d5f6b..428cfaa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,6 +140,7 @@
 WAYLAND_SCANNER_RULES(['$(top_srcdir)/protocol'])
 
 AC_CONFIG_FILES([Makefile
+		 shared/Makefile
 		 compositor/Makefile
 		 clients/Makefile
 		 data/Makefile])