Merge pull request #503 from CounterpartyXCP/master

merge back
[#495] add some aswers in DEX page help
.co -> .io
[#496] Remove statement about all txs requiring no middlemen on Homepage
fix forum suppport url
[#499] remove '..try testnet..' box + add 'problems logging in?' link + add 'free' in the description title
update logo
[#484] Due diligence warning in market view
[#492] use clean transparent image for logo
[#484] add link to Term of Use
Merge pull request #505 from CounterpartyXCP/develop

Develop
Merge remote-tracking branch 'upstream/master'