Model dimensions should be determined automatically

[MosGeo]

Right now, nDim is needed for to determine where the model is located in the project directory. How about having the code search in all directories and just finds the right model automatically.

[tanvidc]

Easy to solve but what if someone has same model name eg. salinas_a in 1D as well as 2D? Ask them to specify nDim only in that case?

Dimension is easy to specify once in main, and folks usually will deal with any one dimension at a time, so maybe its ok the way it is perhaps. Like the labels!