gPodder should depend on python-appindicator package

Currently gPodder package on Ubuntu doesn't depend on python-appindicator package which leads to following traceback on start:

$ gpodder
1388908578.314352 [gpodder.sync] WARNING: Could not find eyeD3
1388908578.429826 [gpodder.extensions] ERROR: Cannot load ubuntu_appindicator from /usr/share/gpodder/extensions/ubuntu_appindicator.py: No module named appindicator
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/gpodder/extensions.py", line 250, in set_enabled
    self.load_extension()
  File "/usr/lib/pymodules/python2.7/gpodder/extensions.py", line 294, in load_extension
    (extension, 'r', imp.PY_SOURCE))
  File "/usr/share/gpodder/extensions/ubuntu_appindicator.py", line 19, in <module>
    import appindicator
ImportError: No module named appindicator

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gpodder 3.5.1-1
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CheckboxSubmission: 3d16077c4fdd6a017d47f6e3dc4f3c54
CheckboxSystem: b633b4f40868d491c2ae5b50030ce6f3
Date: Sun Jan 5 12:04:57 2014
InstallationDate: Installed on 2014-01-01 (3 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: gpodder
UpgradeStatus: No upgrade log present (probably fresh install)