Fixed typo.
Use python-distutils-extra to simplify setup.py.
Updated .gitignore.
Code cleaning.
Start the aria2c daemon on yaner start up.
Added debian directory for deb files building.
Put database related code to a separate file.
Updated translations.
Added title for toplevel window.
Use right aligned labels in new task dialog.
Add tooltips to new task dialog.
Replace deprecated GtkStyle with GtkStyleContext.
Replace Gtk.Table with Gtk.Grid.
Bump version to 0.5.3.
Merge branch 'develop'