debian/watch: No longer follow 0.4.x.
Imported Upstream version 0.9.3
Merge tag 'upstream/0.9.3'

Upstream version 0.9.3
libquvi is now licensed under AGPL-3+.
debian/control: Update (Build-)Depends.
Rename binary packages to libquvi-0.9-*.
Remove old patches.
Remove symbols file until there is a stable API.
libquvi-0.9-dev.install: There is no longer a static library to install.
libquvi-0.9-doc.install: Update location of doxygen documentation.
changelog for 0.9.3-1