Add Powerpool Automation

[RonTuretzky]

• Add a view function that iterates through all circles and returns an encoded array of a tuple of user/circleID for which it is possible to claim for in the powerpool format (reference the existing powerpool automation on here
• Add a function that claims for multiple users in multiple circles
• Add a view function that returns an array of tuples of user/circleID for which the user has given a sufficient allowance for the circleManager contract, has not yet deposited the amount for the interval, and has enough balance of the circle token to deposit for.
• Add a function that attempts to transferFrom a user which has sufficient allowance, balance , and has not deposited yet for a circle in some interval
• add user to boolean mapping for automation
• add checks for depositFor and withdrawFor to see if user allows automation
• in view functions add check that user has allowed automation before invoking