Allow concatenation/operations of maps with stochastic fluctuations with maps without stochastic fluctuations

[mattsignorelli]

This should be allowed and implemented quickly since many maps do not include stochastic kicks in contexts where there are and so just hold a matrix of all zeros which is unnecessary

[mattsignorelli]

actually I changed my mind, the combinatorial explosion of types in the library will be annoying to deal with both internally and externally . It is best to just have one type for radiation and one type without