Added intro, reason and extra sections
Added use case section
Added new use cases
Added section for adding custom changes
removed the slide
added project documentation based on MkDocs
ignore the site content
added site_url configuration
Changed About to Home
Fixed one of the header in the use case documentation
Removed the previous content and provided correct link for
documentation.
Merge pull request #9 from dictyBase/refactor/documentation

Refactor/documentation