Mkdocs-with-pdf

* Fixed a bug with number-only page titles. 67

* Fixed an issue when running on Python 3.6. 58

* Fixed a bug about `exclude_pages` option. 64

* Drop support for Python 3.5.
* Changed the processing of exclusion pages.

* Fixed run on Python 3.5.

* Added a rendering hook module handler.
* Added highlighttable style for material.
* Added headless-chrome launch options.
* Changed to collect JS for each page.