[FCS-34] BerkeleyContentDB class connected into task server.
[FCS-34] Downloading crawling results via web app.
[FCS-34] Downloading improved.
[FCS-34] Downloading package with specified size.
[FCS-34] Downloaded files names changed.
[FCS-34] Views  tests updated.
Merge branch 'FCS-34'

Conflicts:
	server/task_server.py