- Split arguments to gr95Model to deal with dim/length problem. The modelling function now accepts point pairs, which allows us to use it to construct a plotted surface with rgl.
- Removed gr95ModelA: it's not necessary to have an atomic modeling function if we solve it by splitting the substance concentration vectors.
- Modified gr95Resid to handle vector splitting to interface with rsFit.
- Model the plot method for respsurf more legible. More to come.
- Appropriately modified and roxygenized the gr95Model man page. Deleted the gr95ModelA man page.
- Corrected for background, applying M - B to places where the model had only used M.
- Commented in meaning of parameters. Ideally we'd be able to have transparent code in the model, passed from the optimizer.
- Put a norm condition on estimating E by B or Econ, rather than the logical == 0, which limits error.

- matched gr95Resid call to gr95Model call.

- added comments, and 2-plot fitted with actual plots for model fits in the plot method.

- commented out default restricted search. Default search is now unrestricted.
- Changed search bound data type to a numeric vector. This is easier for nls.lm to work with.
- added $fitted element to the respsurf-class object output of rsFit.

- changed demo to reflect search bound data type change from list to vector.