Merge pull request #11 from ioptio/gh-pages

MAID-543 Roadmap banner MAID-552 Update career page (plus other small fixes)
Merge pull request #12 from ioptio/gh-pages

MAID-566 Amend maidsafe.net contact page + MAID-540 Implement new digital assets page to website + MAID-579 Add back button to testnet overview page
Merge remote-tracking branch 'upstream/master' into gh-pages
update company page