Making deb installable by being lintian compatible

According to #2515 the ubuntu software center does not allow to install
debian packages which are not lintian compatible

I worked on the package and made it lintian compatible by doing

* Ignoring errors about arch dependent binaries as we will not split
  this package. The arch dependent libraries are used correctly.
* Added a copyright file pointing to the apache license in debian

Closes #2515
Closes #2320