Coupling Navier-Stokes equations with finite elasticity

Tracker item: 2293
Minor fixes for FSI code.

Tracker item: 2293
Added contributions of lagrange multipliers to solver residuals.

Tracker item: 2293
Added Lagrange multiplier contributions to solver residual.

Tracker item: 2293
Added contributions of lagrange multipliers to solver residuals.

Tracker item: 2293
Tidying up FSI code. More will follow.

Tracker item: 2293
Changed boundary conditions.

Tracker item: 2293
Function for boundary conditions, FSI

Tracker item: 2293
FSI code tidied up

Tracker item: 2293
fixed make problem
Merging Beauof coupling branch for pull request 179