Mark implementation contract initialized on deploy

[jfschwarz]

No description provided.

[auryn-macmillan]

Rather than adding initializer to a constructor, we should have the constructor call initialize. This way users can choose to deploy this as a proxy or the full contract.

e.g.

constructor (address _owner,
    address _token,
    uint256 _depositDeadline,
    uint256 _lockDuration,
    string memory _name,
    string memory _symbol) {
  initialize(
    _owner,
    _token,
    _depositDeadline,
    _lockDuration,
    _name,
    _symbol
  );
}