Documentation: Removed v3.1 and v4.0 references from v3.0 documentation.
v3.0 home pages: Removed v4.0 working example links.
Merge pull request #4385 from pjackson28/removev31references

Remove v3.1 and v4.0 references
Merge branch 'v3.0'
Restored v3.1/v4.0 references (in v3.1 and up)