Switch to side-by-side view

--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -608,6 +608,7 @@
 filters/rclwpd \
 filters/rclxls.py \
 filters/rclxml.py \
+filters/rclxmp.py \
 filters/rclxslt.py \
 filters/rclzip \
 filters/ppt-dump.py \