Deployment of new stkADX staking mechanism

The new staking mechanism was previously voted to go live: https://snapshot.box/#/s:adex.eth/proposal/0x33c23861dd16a207244bb2cda031d89e9ff1ce194b6ebea6cbccf6a5bc19bf9e

We now propose concrete steps to deploy it:

• final audit cycle (internal) of stkADX contract: https://github.com/AmbireTech/adex-protocol-eth/blob/6e1fa68b68f71332955a86274af2358adb5a2243/contracts/StakingPool.sol
• stop current ADX minting that goes to the existing pool, or in other words stop staking rewards temporarily
• deploy new stkADX contract and migrator; from the deployment date, users will have a 60 days deadline to migrate
• set rage leave % to 50%
• immediately after the contracts are deployed and the UI is updated to support the migration, announce the migration on all communication channels

For anyone who fails to migrate in the 60 days deadline, there will be a further governance proposal to decide whether the deadline will be extended.