fixes $new to use proper context url
Revert "initialize lazy loader for every group of objects having the same @context"

This reverts commit 45e5bd215a7ddf0c08053f43e61c46a84140a542.
refactors lazy loading in a way it fetches first @context for results (that might be different ones), then applies lazy loading for each group
test fixes
brings back lazy loading specs
Merge pull request #6 from mediapeers/ticket/13806

Ticket/13806