ref #344 -- added test for issue reported by @asecondwill
ref #344 -- changed TimberPost to prefer data from $wp_query before get_the_ID
ref #344 -- added test for normal page and static front page
Merge branch 'master' into 344_page_data_on_static

* master:
  condensing code. property should be $post->ID not $post->post_id
  fix(compatibility) missing filter argument, fix #346