Elemental-cms

What's Changed
* Removing parameter from readme.md by pablo-pinargote in https://github.com/paranoid-software/elemental-cms/pull/52
* Removing APP_NAME config parameter by pablo-pinargote in https://github.com/paranoid-software/elemental-cms/pull/53
* Adding . in pages, snippets and global-deps names by pablo-pinargote in https://github.com/paranoid-software/elemental-cms/pull/54


**Full Changelog**: https://github.com/paranoid-software/elemental-cms/compare/1.1.17...1.1.18

- Removing APP_NAME config parameter

Setup documentation review.

- Removing environment variable reading for CLI config file
- Changing filepath nomenclature
- Adding requirements.txt file to tests package
- Version going up

Auth source support on mongodb connection string

- Default language redirect when lang_code is not specified on url