Implement new factory

[Alan Lu (cag)]

(Just listing everything that this should handle)

• Resolves Factory methods to return Proxy's extcodehash and runtimeCode #31
• Resolves Research how to best handle changing proxy addresses #38
• Resolves Make deployment call on factory payable #39
• Resolves Add event on creation with mastercopy, initital owner and nonce #46
• Resolves Gas relayer support for factories #67
• Resolves Edge case first tx auth transfer issue #90
• Resolves Add version number to CPKFactory contract #105
• Related: Integrate Rockside as showcase for 3rd party relayers #102

[Alan Lu (cag)]

Ugh, this is still not ready, and generalizing setup straight up made an obvious security vulnerability, which I realized while thinking about the implication of this design, which would in any case require a signature and a transaction authorization on MM (so two user interactions per batch instead of the one that is the case right now). Thought about tx.origin but that opens up a can of phish.

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Okay, I'll resolve this by requiring the owner to either be the msg.sender or to have signed the creation params.

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Note to self: rename from facade to adapter because that contract now has a more complicated interface and it's only used to ease working with the Safe relay.