fix against pip packages version checks
added more clear logging message
enforced receipt of 16 bytes length
Merge branch 'devel' of github.com:globaleaks/GLBackend into devel
fixed some texts of Nodes.md
readded receiver.password in admin_serialize_receiver
added coverage omit for globaleaks/db/update_*.py
improved unit testing and code coverage
added test for migration scripts; archived old empty/populated databases
removed check that introducted bug in fields validation: https://github.com/globaleaks/GLBackend/commit/24df5eba4b2cdc640ca1485d8ef3d3c1362df1e3
enforced download authentication against current logged user
improved test_submissions.py and other UTs
improved fix of https://github.com/globaleaks/GlobaLeaks/issues/829
added unit tests for file collections: zip, tar, targz, tarbz2, antani
improved solution implemented in commit https://github.com/globaleaks/GLBackend/commit/f9c9b8b09fc14198c418f13d9959abe00cea5cc4
removed outdated comment
added Norwegian Bokmål translation
Use by default receipts of length 16 numbers.
Implement download of files via POST based FORM
Add support for disabling receivers that don't support encryption if encryption_only is set.