Switch to side-by-side view

--- a/src/sampleconf/mimemap
+++ b/src/sampleconf/mimemap
@@ -69,6 +69,8 @@
 .ppt = application/vnd.ms-powerpoint
 .xls = application/vnd.ms-excel
 .chm = application/x-chm
+
+.epub = application/epub+zip
 
 # OpenOffice / opendocument. We handle opendocument as old openoffice files
 # for now