beginning implementation of time-averaged diagnostic fields
Merge branch 'master' of https://github.com/fpalacios/HiFiLES into feature_LES
merging master
Changing the way HiFiLES reads cubature data.
Instead of compiling huge long lists into the executable (making compile slow and the binary large), now the data is read in at run time.
This necessitated allowing the code to know where the files are by reading in the environment variable $HIFILES_HOME and appending the subdirectory/file info. Obviously, if $HIFILES_HOME does not exist, this will not work, so this is dependent on autoconf setting the value of $HIFILES_HOME.
Adding a file that was supposed to be in the previous commit.
Merge branch 'master' of https://github.com/fpalacios/HiFiLES
fixing a string to char error which only threw a warning on my machine but threw a fatal error on the cluster.
Output change and GPU fix
Merge branch 'master' of https://github.com/fpalacios/HiFiLES
fixing small mistake; making code compilable
Fixed 'nan residual' error to actually exit upon encountering nan.
Merge branch 'master' of https://github.com/fpalacios/HiFiLES
Fixing output of wall forces so it matches previous values
Merge branch 'master' of https://github.com/fpalacios/HiFiLES
Working regression scripts (test cases need to be added).
experimenting with different modal filter coeffs

Gaussian decay of modal coeffs (from sd3d)
modifying Gaussian modal filter
more experimental changes to modal filter
also fixing cudasetdevice to work on ICME
tidying up modal filter
Replaced several instances of 'exit(1)' with call to 'FatalError'