Comment on page contracts update 1.7.0

These changes were made since version 1.6.0 and deployed during April-May 2022
We moved all strategies to dedicated repositories:

SmartVault 1.10.2-> 1.10.3

Added function claimFor(). It requires approval for the caller.
Few minor changes in PriceCalculator, Autorewarder.
New contract DepositHelper as a central entry point for all vaults.