Substance ids renamed and moved as vector into SorptionBase.
Fix bug - wrong behaviour when unknown region is in input.
Dual porosity test update.

- create new mesh - coarse square
- replace reference data
- compare with analytical solution (dual porosity only - dual_por.con)
Merge branch '1.8.0_master' of https://github.com/flow123d/flow123d into 1.8.0_master