Fixes conditional to check task's due date
Changes _get_gradient_color's return type to string from Gdk.Color
Fixes pep8 errors in urgency_color.py
Updates CHANGELOG to reflect fix for #22
Pep8ifying the codebase
Merge branch 'partp-fix-urgency_color-plugin'
Fixes #24: TypeError : popup() missing 1 required positional argument, by Nimit Shah
Updating CHANGELOG
Merge branch 'Pep8ification of codebase'
popup() missing 1 required positional argument fixed.
CHANGLOG file changed.
PEP8 error fixed.
Fixed bug in api.load_configuration_object preventing plugin configurations from being read. Change 'r' to 'rb' for pickled file.
updated authors/changelog
woops, didn't know about changelog format
Generate the .pot file from the correct Glade files.

It was being generated from .glade files (just one, no longer used)
instead of the ones with .ui extension.
Remove unused Glade file.
Use locale module to get Glade file translated.

See:
https://docs.python.org/2/library/locale.html#access-to-message-catalogs
Update changelog.
Merge pull request #28 from mathematicalcoffee/fix_python3_pickle

Fixed bug preventing plugin configurations from being read