Enhance log message when connection fails

- add I/O to the message to tell the user that the
  root issue was an I/0.
- add the complete stacktrace to the debug level
  in case it is needed for debugging.
Add reports to website:
Add the 'reports' section (Project Team, Source Repository, Project Summary, Mailing Lists,...)
so  that people can find out where the source code is from the website ...
(I had to guess it was on Github...)
Added correct license to POM.