Merge pull request #20 from HaibingShao/react_trans_GIA

React trans gia
Fall back to the my version of vprime calculation due to 1) Active and Inactive sets are wrong, 2) solving vprime with the minimization problem of the local problem increases the robustness of the method. Line search increment is fixed.
Merge branch 'react_trans_GIA' of github.com:HaibingShao/ogs into HaibingShao-react_trans_GIA
updating vprime
clean up
fixing warning message
alternative increment in line search. it speeds up the simulation slightly.
deleted unused pointers.
fixing warning message (initialization order)
clean up
including  residual calculation of sorbed reactions
delete unsused dt variable.
clean up
clean up
clean up
Merge pull request #63 from zolfagha/react_trans_GIA

React trans gia