Add owner

[MerlinEgalite]

I have several questions/thoughts:

• should we create a dependencies folder?
• Classic Ownable(or Owned) or Ownable2Step #15 I would lean toward the simplest way of doing this but it's debtable
• I decided not to put msg.sender as owner so that it can easily be deployed by a deployer contract using CREATE2 without transferring the ownership.

Depending on the answer of the above questions I can move forward with the related features requiring an owner (#41, #29)

[MathisGD]

NB: Blue does not even need an owner now, so we might temporize a little bit this one.

[MathisGD]

Also it lacks some testing

[MerlinEgalite]

NB: Blue does not even need an owner now, so we might temporize a little bit this one.

Yes that's why I wrote:

Depending on the answer of the above questions I can move forward with the related features requiring an owner

[MerlinEgalite]

The last 2 commits are not verified, I need to fix that

EDIT: done

[MathisGD]

I would like to see an alternative version, that's included in Blue.sol directly (similar to UniV3)

[MathisGD]

Example in #67