Feat/g3m liquidity exact token

[clemlak]

Update addLiquidity and removeLiquidity to use an exact amount of token X or Y (previous functions using an exact amount of liquidity were kept).

[Alexangelj]

What's the rationale for these exact functions? I see us using them in the sim since they reduce some of the external code we need to do (computing both amounts)

[clemlak]

What's the rationale for these exact functions? I see us using them in the sim since they reduce some of the external code we need to do (computing both amounts)

Yes, they are mainly convenience functions, they'll be useful for the sims but could be useful for end users too.