* AssemblyInfo.cs: initial commit
* NpgsqlCircleProvider.cs: circle members are now stored in bd upon
their user's name
* InputCircle.cs: fixes the new CircleManager interface usage
* Yavsc.sln: Adds the `Presta` project
* CircleController.cs: * Authorize some Http methods
* Lists circles as circles
* style.css: Fixes the missing "hidden" css class
* AccountController.cs: using the new Circle provider interface
* BlogsController.cs: * using the new Circle provider interface
* do not test blog entry collections in order to group them by a
unique user name or title, it's too bad,
instead, keep user's request id as guide to model and view.
* YavscHelpers.cs: Adds a Circle Html formatter
* Circles.aspx: List of circles is now given as a list of `Circle`
objects
* instdbws.sql: fixes the db in order to store user names in circle
member's records.
* BlogEntryCollection.cs: ConcernsAUniqueTitle and ConcernsAUniqueUser
are now Obsoletes
* UUTBlogEntryCollection.cs: Drops a useless ctor
* CircleProvider.cs: The `CircleManager` now delivers the user's
circle as a `Circle` object collection.
Paul Schneider