Create a roadmap for 2018

Things we know we want (in no specific order):

• Integration of blobs into bitmask.mail (on demand download of message bodies).
• Search index.
• Sync heuristics.
• Python 3 port.
• Improve standalone use, modularize auth, create standalone example app (password manager?).
• Improve Thunderbird integration.
• Research/implement mobile client app.
• Cleanup, define and apply code standards.
• Integration with the platform (platform#8854).
• Add recovery code, eliminate shared db.

Here is a wiki page where we can come up with a roadmap for 2019: https://0xacab.org/leap/soledad/wikis/2018-roadmap