Merge remote-tracking branch 'stefw/display-extensions'

diff --cc gcr/Makefile.am
index c0551e1,bec3711..24aa95e
--- 1/gcr/Makefile.am
--- 2/gcr/Makefile.am
+++ b/gcr/Makefile.am
@@@ -72,11 -72,10 +72,12 @@@ lib_LTLIBRARIES = libgcr@GCR_VERSION_SU
  
  libgcr@GCR_VERSION_SUFFIX@_la_SOURCES = \
        gcr-certificate.c gcr-certificate.h \
 +      gcr-certificate-basics-widget.h gcr-certificate-basics-widget.c \
        gcr-certificate-chain.c gcr-certificate-chain.h \
 +      gcr-certificate-details-widget.h gcr-certificate-details-widget.c \
        gcr-certificate-renderer.c gcr-certificate-renderer.h \
        gcr-certificate-exporter.c gcr-certificate-exporter.h \
+       gcr-certificate-extensions.c gcr-certificate-extensions.h \
        gcr-certificate-widget.c gcr-certificate-widget.h \
        gcr-collection.c gcr-collection.h \
        gcr-collection-model.c gcr-collection-model.h \