application: Remove unused signals and methods
Move the gitignores to a single file
bin: Make sure we use python2 when python3 is the default
Remove retired maintainer from the DOAP file aimed at packagers
Remove obsolete svn file
pipeline: Raise an exception when setting the timeline fails
pipeline: Simplify logging of obtained duration value
elements: Remove code with no effect
elements: Avoid 0-sized clips to become invisible
project: Add the aspect_ratio dynamic property
tests: Allow the tests to be run by frameworks like nosetests
mainwindow: Reuse in_devel from configure
mainwindow: Make the version display more robust in the about window

Also add a unittest for the latest version logic and
moved the Pitivi tests to test_application.py because
that's the module where the Pitivi class resides.
render: Allow the render progress dialog to close the desktop notification

This got broken in 38861f742af4ce115c9265f3e7c85d8ea0f17111
configure: Rename constant name to be uppercase