Added link to image

* Added link to top image to openbazaar site.
* Minor markdown cleanup.
Merge pull request #1144 from Renelvon/add-image-link

Link top image to OpenBazaar site
Updated license date

Changed 2014 to 2015 in preparation for new year
Merge pull request #1145 from benhc123/patch-19

Updated license date
Updated license date

Made licensing clearer by changing to (c)2015 to (c)2014-2015
Merge pull request #1147 from benhc123/patch-21

Updated license date