BK-787 Handle the case when the body element is missing
Merge remote-tracking branch 'sfdev/2.0' into 2.0
Merge remote-tracking branch 'sfdev/2.0' into 2.0
BK-828 Find cover image in an EPUB file
BK-828 Set book cover on import
BK-828 Check whether cover is valid
Merge remote-tracking branch 'sfdev/2.0' into 2.0
Merge branch 'bjandras-2.0' into 2.0