Switched from Sybren's RSA library to the new stdlib module 'secrets' to
generate secret tokens. This also means that the rsa library was demoted
to secondary requirement.
These changes mostly revolve around the change in ObjectId constructor
when running on Python 3.6. Where on 2.7 the constructor would accept
12- and 24-byte strings, now only 12-byte bytes and 24-character strings
are accepted. Good thing, but required some changes in our code.
Other changes include hashing of strings, which isn't supported, so they
are converted to bytes first, and sometimes converted back afterwards.
Python 3 supports 'namespace packages', and thus can see a directory
without __init__.py as something importable. This caused a name conflict,
since there were both the file static.py and the dir static.
The 'manual fixups' are:
- incorrect use of dict.items() where dict.iteritems() was meant; this
results in list(dict.items()), which I changed to dict.items().
- removal of 'from __future__ import' lines, which 2to3 changes into
empty lines; I removed the empty lines.
Some packages had to be removed; they are deployment-specific anyway,
and may not even be needed any more.
I've also added some secondary requirements that weren't specified yet.
The next steps will be to split into runtime and development requirements.
We introduce two new classes StorageBackend and FileInStorage, which
are subclassed by CGS and local Pillar. This makes supporting multiple
storage solutions easier.
Added a note that states the add-on requires Blender 2.78+. Even though
this isn't strictly true (it also supports 2.77a if you manually install
the Blender ID add-on), it simplifies things greatly.
Fixes T49721
It was used in an experiment in Flamenco as an alternative to JSON; it
might still be used in the future if BSON turns out to be significantly
faster to generate.
