Verto

- Fix bug where Panel processor does not handle punctuation characters in titles and subtitles.
- Dependency updates:

- Update `markdown` to 2.6.11.
- Update `setuptools` to 38.4.0.
- Update `sphinx` to 1.6.6.

- `save-title` and `remove-title` processors now only search first line.

- `relative-link` processor will now handle query parameters.
- Modify `panel` processor for translating subtitles, by requiring subtitle text as second level heading.
- Modify `image` processor for translating captions, by requiring caption text between start and end tags.
- Modify `image` processor to allow finer control of output, in particular when dealing with image with width values.
- Add new tag configuration value `tag_argument` to override tag name.
- Dependency updates:
- Update `markdown` to 2.6.10.
- Update `Jinja2` to 2.10.
- Update `setuptools` to 38.2.5.
- Update `sphinx` to 1.6.5.

Fixes:

- Adds all interactives to required files.
- Typo in Interactive documentation.

Features:

- Added `image-inline` processor, intended for use in tables.
- Added `scratch-inline` processor for inline scratch support.

Fixes:

- Removed `beautifulsoup4` dependency.
- Typo in `VertoResult` documentation (**heading_root** -> **heading_tree**).

In this hotfix Verto result data for unique identifiers and required files is now only cleared when explicitly told. Result data that is per document such as title and heading tree are cleared per conversion.

Fixes:

- Remove implicit Beautify processor, fixing white-spacing issues.
- All terms are added to glossary correctly now.