WIP - class to manage fetching chunks of data from server
WIP - fix some bugs with network manager
WIP - fix another bug with network manager
WIP - integrate the network manager w/ addon p.1
WIP - refactor some logic out of NetworkManager into new StreamManager
WIP - fix bug w/ NetworkManager
WIP - fix bug with loading fetched pages into array
WIP - make addon work after creation of StreamManager
WIP - some refactoring of addon communication flow
WIP - make double size of xref fetching work again