Dolfyn cleaning function updates

[jmcvey3]

Renames and makes the functions that calculate water depth and remove surface interference more robust. The functions were designed around Nortek ADCPs but didn't take into account the calculations RDI already does. Errors or warnings will guide the user through the proper use of functions if previous calculations were already completed or data is missing.

Also removes the "ignore rankwarning" as some users may not want to do so, and updates future package deprecations.

Solves the problems Calum and I found in Issue #353. Tests were updated as appropriate.