Ability to alter the EQ_Phases based on saturation level of elements

[KeiranHines]

David has requested a feature be added:

This feature is to allow for GoldQC to check the saturation Indices (SI) of the solution if there's any that are greater than 0 add them to the EQ_Phases and re-run the Phreeqc test.

[flashliquid]

...greater than or equal to 0