#43 Add methods to fetch all items from keychain
#43 Make items list into a tuple
#43 Item repository now returns an ItemCollection rather than a tuple
#43 Add filter method to item collection
#43 Remove search method from keychain
#43 Remove filter from item repository
#43 Add meta item and use them in the collections
Merge pull request #44 from OpenPassword/feature/43-Create-collection-of-items-metadata

Feature/43 create collection of items metadata