1. Send '*'s instead of the actual ACCESS and SECRET keys on the credentials page
2. Concentration models now importable and exportable. The exported concentration models never will work in StochKit2, but we don't need them to
3. Model editor toolbar now on convert tool page
Added two Lotka Volterra examples
Word changes
Fixed model import problem
Fixed another import bug
Example folder added in root directory (copied from StochKit)
Merge branch 'hc' into develop