Add "Rendition" to the vocabulary map.
While parsing the opf files, rendition properties we're being ignored because it was missing from the vocabulary map.
Merge pull request #1 from dsandin/Kobo_WinPhone8

fix error_look_table init
Merge pull request #2 from DeM0NKinG/Kobo_WinPhone8

Add "Rendition" to the vocabulary map.