kernel: SortCollection is no more lazy

The previous implementation sort only when needed (iteration,
search, accessing) was harder to understand, not really faster.
The new implementation always insert in the correct position
the new item.

2014-04-22  Gwenael Casaccio  <gwenael.casaccio@gmail.com>

	* kernel/Collection.st: Collection>>#asSortecCollection: don't
	use Collection>>#asSortecCollection.
	* kernel/SortCollect.st: SortedCollection is no more
	lazy and is always sorted.
	* tests/Ansi.st: Sort block can raise an exception.