Kutalmış Berçin authored Feb 06, 2019 and Kutalmış Berçin committed Feb 18, 2019

    - If applied: This commit will restructure dnsFoam in line with other
                  solvers, e.g. pisoFoam, without changing its external
                  behaviour.

    - Why: Prior to this change, dnsFoam structure reflected v.2.x and older
           solver style.

    - How: This change collects naked dnsFoam code parts under general file
           structure, e.g. via UEqn.H.

    - Verification: No change in any output of dnsFoam tutorial case.