Verto

- Resolve issues of broken package due to unpinned dependencies.
- Remove automated deployment to PyPI.

***Broken release, removed from PyPI.***

***Broken release, removed from PyPI.***

- Add ``blockquote`` processor for customising block quote style.
- Added CodeCov to repo
- Dependency updates:

- Update ``python-slugify`` to 1.2.6
- Update ``sphinx`` to 1.8.0

- Modify Interactive processor for translating ``text``, by required text between start and end tags for whole page interactives.
- Modify Verto parameters available on creation to allow modification of default required parameters for each processor.
- Dependency updates:
- Update ``setuptools`` to 40.2.0.
- Update ``sphinx`` to 1.7.7.
- Update ``sphinx_rtx_theme`` to 0.4.1.

- Modify interactive processor to use `slug` rather than `name` to identify interactives.
- Modify video processor template for YouTube videos.
- Modify boxed-text processor to have optional type parameter.
- Update style error message to include line numbers.
- Dependency updates:
- Update `python-slugify` to 1.2.5.
- Update `setuptools` to 39.1.0.
- Update `sphinx` to 1.6.6.
- Update `sphinx_rtx_theme` to 0.3.0.

- Modified Interactive processor to change interactive template depending on the type of file path given for the thumbnail image of whole page interactives (external or internal) as well as changed the default path for the thumbnail.