refs #25 support HTTP digest while sending API secret
api prod url
added max returned items to DMItemCollectionViewDataSource &  DMItemTableViewDataSource
Merge pull request #26 from akhenakh/issue25

Issue25 support digest auth for api id & secret
Merge pull request #27 from akhenakh/max_number_of_items

added max returned items to DMItemCollectionViewDataSource &  DMItemTabl...