add debug log.
resolved conflicts.
Merge branch 'mt' of github.com:onyx-intl/booxsdk into mt
Merge branch 'mt' of github.com:onyx-intl/booxsdk into mt
Merge branch 'mt' of github.com:onyx-intl/booxsdk into mt
Merge branch 'mt' of github.com:onyx-intl/booxsdk into mt
cleanups.
Merge branch 'mt' of github.com:onyx-intl/booxsdk into mt
changed invoke order.