Merge branch 'master' of https://github.com/Thibaut/devdocs

Fetching upstream
Added Laravel scraper and placeholder filters
Drafted filters
Added Laravel documentation, still needs some fixes
Merge branch 'master' of https://github.com/Thibaut/devdocs

Merging with upstream
Code formatting cleanup
Added icons, fixed Introduction repeated 4 times
Removed release history and upgrade guide