Proposal Template Publishing

[Stuyk]

Want to add the following functionality:

• Ability to create a proposal template.
• Works with extension context: name.proposal.json
• File name determines the proposal name. Such as fixsomething.proposal.json which should be limited to 12 letters
• We could also just trim off excess after splitting the file name into parts.

Proposed Format:

{
    "proposer": "myaccount",
    "approvals": [
        "uada1@active",
        "uada2@active",
        "uada3@active",
        "uada4@active",
        "uada5@active",
    ],
    "transactions": [
        {
            "contract": "eosio.token",
            "action": "transer",
            "data": {
                "from": "whatever",
                "to": "whomever",
                "quantity": "5.00000000 UOS",
                "memo": ""
            },
            "authorization": [
                {
                    "actor": "propacc",
                    "permission": "whatever"
                }
            ]
        }
    ]
}