Hi Alexandre,
thanks for adopting the package!
It looks fine, but I have 2 minor notes due to the packaging:
1) You are using dh 9, but there are no notice in the changelog.
2) Use VCS for package maintainance.
3) Optionally you can try to use dh-autoreconf ( --with autoreconf), but
it is up to you.
Also you are targeting the package into unstable, but the Wheezy
is not yet released. Let's wait some days till it happens.
Cheers,
Anton