This reverts commit c5bea524.

This reverts commit b18f6cc1.

picked up by a copyright change.

Exception: applyWallFunctionBoundaryConditions.C cannot split #include
directives.

Added compressibility support to MRFZone.
Required generalisation of the oneField concept.
Also clean-up the use of one and zero for consistency.
Simple mixerVessel2D tutorial case supplied.

- space between keyword and bracket in 'for(..)', 'if(..)', 'while(..)'

uniformDimensionedVectorField.

- change system/controlDict to use functions {..} instead of functions (..);
  * This is internally more efficient
- fixed formatting of system/controlDict functions entry

- pedantic change: use 'return 0' instead of 'return(0)' in the applications,
  since return is a C/C++ keyword, not a function.