add initial content

.gitignore

.gitlab-ci.yml

CONTRIBUTING.md

Dockerfile

LICENSE

assets/scss/_variables_project.scss

config.toml

content/en/_index.html

content/en/about/_index.html

content/en/about/featured-background.jpg

content/en/blog/_index.md

content/en/blog/news/2020-03-16_new-docs.md

content/en/blog/news/_index.md

content/en/blog/releases/2020-03-17_open-source.md

content/en/blog/releases/_index.md

content/en/community/_index.md

content/en/docs/Concepts/_index.md

content/en/docs/Concepts/dyn-phasors.md

content/en/docs/Concepts/nodal-analysis.md

content/en/docs/Concepts/powerflow.md