###User stories:
As an event organizer, I want to be able to set a goal for my event, so that participants are motivated to join and contribute based on the goal, and so that I can have a clear story of the event outcome based on the goal.
As an event participant, I want to know how my contributions help accomplish the goals of the event, so that I can understand the impact of my edits and of the event overall.
As an individual editor, I want to be able to set goals for myself and track my progress against goals, so that I can edit with clear milestones and boundaries that are manageable and rewarding.
As an individual editor, I want to be able to discover goals set by other editors or groups of editors, so that I join in these challenges myself or be inspired to create a similar one myself.
####Background:
When editors first create accounts, there may be some basic milestones for them to reach that are accompanied by simple notices, such as reaching 100 edits or 1000 edits. But what about after that? How can editors continue to feel motivated to edit, and how can they have goals that are meaningful to them and/or the communities they collaborate with on the wikis?
One way we are thinking of addressing this question is by allowing editors to set goals, either as individuals or for a larger group. The individual goals can be considered like a "personal challenge." The group goals can be a goal for an event (like an edit-a-thon or backlog drive) or for a group/community (like a WikiProject or affiliate). The uniting factor is that a goal needs to be chosen by at least one editor, and then it needs to be publicly shared (so there is a sense of responsibility/ownership), and then the editors need to be able to track their progress against the goal and have a way to share the final outcome (such as reaching the goal, not reaching the goal, almost reaching the goal, etc).
###Acceptance Criteria: