Usability of CycleRange and RepeatRange

[bash]

CycleRange returns an IBuffer which brings with it the need to dispose the result which is not very practical.

I think we should add an overload for readonly lists that returns a regular old IEnumerable (that's easy because the list is already materialized).

We can either add an overload of the existing CycleRange (that's a source breaking change though).
Alternatively we can use a new name (e.g. CycleList).

[FreeApophis]

I think the names should be different, and I think List is the best name for this kind of abstraction:

alternative suggestions, I list stupid ideas too, to make us think one more time:

• Repeat/CycleMaterialized
• Repeat/CycleEager(Range, Collection)
• Repeat/CycleInMemory
• Repeat/Cycle

We could mark this feature as Experimental as long as we are not sure about the name.