Update debian/watch: new upstream.
Update maintainer's email address.
Update debian/control:
- update Homepage field
- update short and long descriptions of binary package
Bump debhelper version to 9 (was 7.0.50~); update debian/compat.
Update years and upstream info in debian/copyright.
Bump Standards-Version to 3.9.5 (was 3.9.2): no changes required.