* Remove trailing whitespace and tabs
* Move electrochemistry output to the test problem (not related to 2pnc in general)
* Make electrochemistry have static members
* Use naming conventions for indices in the model
* Try to make the model work with cellcentered too (No cell-centered test available so far)
* Make electrochemistry input parameters part of a group "ElectroChemistry"
* Make the electrochemistry model a named enum (ElectroChemistryModel)for readability

Reviewed by martins 



git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@15298 2fb0f335-1f38-0410-981e-8018bf24f1b0