Update facade reference.
Update upgrade guide.
Fix headings.
Update upgrade guide for 4.2.
Working on upgrade guide.
Update eloquent documentation for trait soft deletes.
Fix an issue in the request documentation

Previously Request::method()
Now Request::getMethod()
Merge branch 'fix_request_docs' of github.com:phawk/docs into fix_request_docs

* 'fix_request_docs' of github.com:phawk/docs:
  Fix an issue in the request documentation
  Update eloquent documentation for trait soft deletes.
  Working on upgrade guide.
  Update upgrade guide for 4.2.
  Update type in Resource Controllers section in docs
  Document view:publish.
  Fix headings.
  Update upgrade guide.
  Update facade reference.