org file properties ignored

[stevium]

It looks like properties from posts.org files:

#+ORGA_PUBLISH_KEYWORD: PUBLISHED
#+TODO: TODO NEXT | DONE
#+TODO: DRAFT | PUBLISHED
#+SELECT_TAGS: apple export

Are being ignored by orga.parse, and they cant be used for filtering sections like:

** Here is a headline with the tag apple :apple:
Hey
** you are not supposed to see this
Hey
** Here is another apple :apple:
Hey

Thus resulting in second heading being visible due to section.properties['select_tags'] being empty:

[stevium]

I have narrowed down the change to this commit: 3a4ccf4
@xiaoxinghu could you please tell if this is expected behavior or maybe an issue introduced with the new parsing logic?