Added uniform Robin BC

[PL] Add multicomponent boundary conditions.

The main work was done before, but the parser was missing.

[GW] Corrected the sign of the groundwater flow velocity

small improvements of queryMesh 

[NL] Fix Newton max iterations counter comparison.

Restructured bcs

Named Functions

Dmitri Naumov authored 8 years ago and Christoph Lehmann committed 8 years ago

Mainly clarifying the algorithm and micro-optimiziations.