Dynamic quorum

[Sarahtonein]

Whats new

• Additional logging for proposal submission attempts, and space modification
• Helper func to determine quorum value (no decimals used)
• modify_space.js, used to modify the snapshot space
• Sub-process call of modify_space.js in the tasks/tasks.py for concluded proposals

How to test

• Update values to your test space
• set appropriate env vars
• Reduce proposals/proposals.py time to your desired time
• Create and vote on a proposal, view logs

Tested and working