Document and validate paging parameters and behavior

[ITDancer13]

I'd suggest to rethink our pagination. At the moment it's a bit confusing having nullable integers on our model with 1...int.MaxValue restrictions which are never checked. Additionally we have default values as configuration option and internal logic like if (pageSize <= 0) paging will not be applied.

My suggestion for version 3 would be to define and document the following restrictions:

• Valid values for PageSize and DefaultPageSize: 0...int.MaxValue with 0 = paging disabled
• Valid values Page: 1...int.MaxValue

If invalid values are passed to SieveProcessor.ApplyPagination an specific exception should be thrown.

[hasanmanzak]

I overriden the behaviour of paging as if requested page is -1 then disable paging as a wrap around kind of thought, not the pageSize.