Fix doc on web page with invalid maven repos for OpenIMAJ driver

I recently tried to build, and noticed the old 'octopussy' maven repositories are no longer available. I updated the web page to use the repo I found in the pom.xml in the source tree (and I verified I could then build successfully). 

I apologize, but my editor mangled a unicode character at the top of this index.html file, and I had to redo the edit (and I managed to get the url wrong the second time). I think the final edit is correct. My intent was to remote the 2 'octopussy' repos, and add the snapshot openimag repo.