Added error-estimation for balakotaiah-two-equation-model-solutions. The code does not differ very much from ErrorEstimationBalakotaiahSINUSTest and the associated spline-versions. Differences are: Introduced double "inct_spline" in constructor as time-increment between two temporally adjacent splines and replaced double "deltat" by it. The time-increment for temporal differentiation is now denoted by "dt" and is not part of the class any longer. In the constructor the raw data is first interpolated linearly in temporal "direction", then the resulting discrete array (in spacial variable) is interpolated with cubic splines.
Some changes. Especially: Declared number of data-points in x-direction (for spline-interpolation) as private.
Created error-function, that returns the error in x-momentum balance of an h-q-model in dependence of the central quantities, i.e. position, time, mathematical parameters concerning splines (spacial and temporal increments, #datapoints in spacial "direction"), physical parameters concerning the flow (Reynolds- and Weber-Number inclination-angle of the wall).

is ahead of 'hansgithub/jabeinclude' by 61 commits.
Some changes that should make the executable faster.
Removed superfluous variable.
Added test "ErrorEstimationBalakotaiahSPLINESFileInputTEST.cpp" for "ErrorEstimationBalakotaiahSPLINESFileInput.cpp" . The test is passed, if the output of the executable "errorBalaTEST", that is created with this test-code, does not differ too much from the output of the executable "errorsplinesFileInput" (that is created by the code "ErrorEstimationBalakotaiahSinusTESTSPLINESFileInput.cpp"). For the actual parameters the test was passed successfully.
Updated Makefile.
Changed comment. Several changes in function main(): Declared variables. Changed name of the output-txt-file.
Some conceptual changes were made to evaluate the error in x-momentum-balance at different times all over the film. The output-data can be used to visualize the error. Furthermore: Use of destructor of the HQUV-class is made!
Updated Makefile.
Set unused variables/code as comment.
4 wavelenghts. New phase-velocity is used that was calculated with proper formula from Liang's reference-data. "./poissonP1 JanALE.json" is executed without problems.
Fixed bugs.
Fixed bug.
Fixed bug.