Merge pull request #12 from bittner/master

Changed related_name in foreign key "created_by", reformatted code, readme and license
The top view (list of lists) generated a javascript error because base.html refers to thedate, which the view function list_lists did not define.
Merge pull request #14 from leephillips/master

The top view (list of lists) generated a javascript error because base.h...
When there is only one group, do not force the user to select it in the add_list form.
Merge pull request #15 from leephillips/ap

When there is only one group, do not force the user to select it in the ...
A task with no due date created an error when checking for completion.
Merge pull request #16 from leephillips/ap

A task with no due date created an error when checking for completion.
Indentation fix
Remove stray CSS reference; whitespace
Fixes #17
Display full names as well as usernames in the assign_to dropdown when
adding a task.
Merge pull request #20 from leephillips/ap

Display full names as well as usernames in the assign_to dropdown when
Neutralize some assumptions
Set default value for boolean Item.completed
Remove most CSS, clean up templates
- Assume the existing site has its own styles
Add new settings for default list ID, default assignee, default redirect on public ticket submission
Specify exclude Meta on form definitions
Remove deprecated cycle tag from templates