add new version of ABLTerrainSolver compatible with OpenFOAM v2.1 and higher

The PIMPLE loop controls needed to be changed within ABLTerrainSolver.C, and also a modification to pEqn.H.  These modifications were identical to the changes made to ABLSolver for OF v2.1-and-higher compatibility.
modify the include path so compiler finds the horizontalAxisWindTurbinesALM header
modify the include path so compiler finds the horizontalAxisWindTurbinesFAST header
add new version of windPlantSolverFAST compatible with OpenFOAM v2.1 and higher

The PIMPLE loop controls needed to be changed within windPlantSolverFAST.C, and
also a modification to pEqn.H
add (copy) the compiled openfast library to solver directories compatible with OpenFOAM v2.1
modify the include path so compiler finds the horizontalAxisWindTurbinesALM header
revert to previous version of pisoFoamTurbine compatible with OpenFOAM v2.1

Pete's previous modification allowed compatibility with OpenFOAM v2.3, but so
far I'm testing SOWFA with v2.1.x so I needed to revert.
modify the include path so compiler finds the horizontalAxisWindTurbinesALM_tn header
modify the include path so compiler finds the horizontalAxisWindTurbinesALM header
ignore (do not track) compiled FAST executable
modify so only OpenFOAM v2.1 compatible applications are compiled/cleaned

I'm currently testing with OpenFOAM v2.1.x on Kubuntu 14.04, and
the Allwmake script now compiles all the SOWFA applications without
any errors, huzzah!