Pagination improvements

[ohadschn]

The first commit converts the pages observable to an array for a better binding experience, and adds a limitedPages observable array that is constrained to contain only paginationLimit pages as per #22.

The second commit adds a blanks array to each page in the pages observable array introduced above whose length is the amount of elements for that page that are missing for it to have perPage elements (i.e. 0 for all pages except the last one, for which it equals perPage-[pageElementCount]). The view can then bind to it in order to complete these missing entries and avoid the annoying table resize jumps when switching to and from it.

[ohadschn]

@cbankester Just in case you missed this :)

[cmbankester]

@ohadschn I like what you did here! I never would have thought to include empty row slots in DataTable, but that really makes sense. I'm going to do a code review and then we can get it merged in.

[ohadschn]

I admit, that was a little hackish but you can't argue with the result :)