Updated links to master branch to point to the v3.1 branch
Changed breadcrumb and nav links to stay within v3.1
Merge pull request #5081 from LaurentGoderre/v3.1

Changes necessary for the new v3.1 branch
Documentation: Fixed various outdated v3.0 links and an ID/markup issue.
Merge pull request #5093 from EricDunsworth/v3.1-broken-link-fixes

Documentation: Fixed various outdated v3.0 links and an ID/markup issue.
Merge branch 'master' of https://github.com/wet-boew/wet-boew into v3.1