Add note about pull requests to develop, not master.
Starter CONTRIBUTE.md, cribbed heavily from WP-CLI
Ooops, it needs to be called `CONTRIBUTING.md`
Licence clarification
Always return a post_type when calling get_post_type_in_lang.
Use get_default_post_to_edit() when $post_translation is empty
Add a few default values for $term_translation.
Simply translation editor template.
Don't have double ;;
Correctly fall back to using page.php if _wp_page_template is an empty string

The check for `false !== $custom_page_template` is too strict as `get_post_meta` returns an empty string rather than `(bool) false`. This incorrectly caused the `$custom_page_template` if to return true which then caused a `locate_template( array( '' ) );` further down which would fail thus causing pages to fall back to using `single.php` instead of `page.php`.

This PR loosens the `$custom_page_template` check so that any falsey value will cause a fallback to `page.php`.
whitespace cleanup
Fix taxonomy template loading.
Fix body class for taxonomies.
Renamed get_query_template() type to 'bbl-single'.

To make clear it’s a Babble call.
Fix breaking rewrite rules starting with ^.
Fix registration of 'term_translation' taxonomy.
Merge branch 'master' into develop
Merge pull request #166 from markoheijnen
Merge pull request #167 from markoheijnen
Merge pull request #177 from willmot. This logic needs a cleanup regardless.