Transient Boundary Conductance

New in Groundwater Vistas 5.25 Build 2 is the ability to make conductance vary with stress period for rivers, drains, and GHBs. The "K" parameter is now on the transient data spreadsheet for these boundary types. When reading in an older GV file, the default K is placed in the spreadsheet making this backwards compatible with all models. Note that Streams already had a time varying conductance through transient width term.