Remove leftover output files from the old build setup.

Change-Id: I187b44a4c9fdc015cdc25b6d258b1db0681d6c3c
Adapt samples-project-testing test site to changes in the epub-modules
build system.

Change-Id: Ifa6e8aea6cc29496c6d28e5e1810e618b58f30b4
More compact logging during package document parsing.

Change-Id: I57b1311ab44ae025034fb2da43dcee6120d39fee