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add bitcoin/Coinjar
add bitcoin/Coinjar
Merge pull request #622 from frenchi/master

Add Coinjar
Update VASCO provider info

I received an email from a worker at VASCO saying the following:

> There is a little change I would like to make. VASCO as vendor of 2FA supports also phone and
> mail. Today there is also Color QR code and out of band authentication. There is also
> Authentication and signature. Signature is especially interesting to avoid the MIM.
> 
> Could you update the site and add for VASCO also Phone and mail.
Merge pull request #621 from mxxcon/images

Optimized and replaced logos