add  is using power bc into the FlowAndTemperatureControl class

Add OGS_FATAL for is_linear without use_algebraic_BC

read weighting factor from prj file

activate the switch requiresNormalization


using the structure to initialize

initialization become cleaner

Rename function to algebraicBcConcreteProcess 

Algebraic BC in process data

fix type process data

set to use process data in HeatTransportBHE

change weighting_factor type to double

use combined structure

change constructor to use the structure

If OpenMP implementation is not based on pthreads, the
locking is not correct. The error shows up in a PETSc build
with multiple assembly threads on a single MPI rank.

Remove unused boost/... headers.

A little code duplication in favor not to deal with pointers.

The matrices are not in use by any process.

The Picard implementation would be slightly different
then the current assembleGeneric suggests anyway.

Simplifying the code, small cleanups.

The types for the jacobian matrix and the residual vector are not needed
in the NewtonRaphson class interface, only in the interior and can be
(mostly) deduced from the JacobianMatrixUpdate and ResidualUpdate first
function argument.

... to exclude access to data members via the this pointer.

Changed some solver(preferred) or test tolerances slightly to get tests satisfied on BGR servers