Add discussion to plugin projects

[ewinslow]

Background: There is no way to ask for support for a particular plugin other than in release comments, but that doesn't lend itself to identifying and resolving separate issues very much. Early on a few plugins made groups for themselves to be able to have discussions handle this need.

We should just build this right into the plugin project page itself so that pages don't just get long strings of comments, but discussions can be separated into different issues and people can easily look through the list of known issues.

Features:

• Discussions should be contained by the project, not the release, otherwise they'll disappear every time a new release is shipped, which is probably not actually what you want.
• URL for this: /plugins/:guid/discussion
• Option to turn it off?
• Way to move all those groups' content to the appropriate plugins.
• Way to move individual discussions from a group to the specific plugin, (similar to moving to another group)

[ewinslow]

Been seeing a bunch of plugin-specific questions on the community lately. This would be really helpful for directing those to the appropriate location.

[ewinslow]

@PerJensen I believe we worked on a design for this at one point?

[PerJensen]

@ewinslow Do you mean this? My notes from then:

Split up description, support (comments) and gallery. Ajax load would be nice. Buttons moved to sidebar. List of releases as select dropdown. Author avatar, small. Tags.

[ewinslow]

That's the one! Thanks! You wouldn't happen to have mobile designs for this, would you?

[PerJensen]

No, we did not find a mobile design.