spearating operator and function expressions.
Merge branch 'master' of https://github.com/LEMS/jLEMS
Propagating dimensions into state types with a new method,
StateWrapper.getDimensionString() that returns the dimensionality as a
comma-separated string containing the dimension powers "m,l,t,i,k,n,j"
Ensuring all examples have attribute dimension in DerivedVariable
Merge pull request #35 from LEMS/statedimensions

Statedimensions