IOTower should allow aliasing factoids

[Space Hobo]

Related to bug#409225, IOTower should allow the aliasing of factoids.

My current thought is that this should be done with a ForeignKey to 'self' in the Factoid model, and some logic in the views to prevent loops.

Questions:

Does this warrant a ManyToManyField?

Should FactoidResponses pointing to an aliased factoid be added to the
total set?

Example:

 foo =is= bar
 baz =is= quux
 baz -alias-> foo

 so queries to foo will always trigger "foo is bar", but baz will trigger "baz is bar" or "baz is quux".

These questions suggest that a blueprint may be a good idea.