Modified indexing of JGinv_upts,fpts to be more cache-friendly; fixed performance issues of coordinate transformations on GPUs; debugging mesh motion on GPUs (again).
Rigid motion & sin perturbations moving-mesh functionality implemented on GPUs & debugged.  Minor performance issues (array indexing order) for mesh motion-specific arrays to be worked on yet.
Changed indexing of JGinv_dyn_upts/fpts for better cache efficiency.
Merge branch 'feature_Mesh_CUDA'
Merging implementation of primary moving-mesh functionality in CUDA into master
Added ability to add blank lines between input parameters in input files.
Added SA turbulence model for CPU
Fixed compiler flag for MACHINE=ENRICO
Removed 'in_' from variables in the cuda_kernels
Merge branch 'master' of https://github.com/HiFiLES/HiFiLES-solver into feature_RANS
Added SA turbulence model for GPU
Merge branch 'master' of https://github.com/fpalacios/HiFiLES into feature_LES
bug fix after merge