start process of adding new communicators (work in progress)
remove obsolete ra_table and rb_table
minor commit to trigger branch
remove obsolete ra_tables rb_tables
fft tests working: figured out fourier ordering. need to rewrite all loops
stop if fft unit test fails
create the module p3dfft_wrapper and use it everywhere
use new wavenumber ordering everywhere + add functions wave_x wave_y wave_z
typo corrected, now unit tests pass
fix another typo
Merge branch 'update_p3dfft' into several_MPI_communicators

Conflicts:
	src/cof_p3dfft.f90
	src/flusi.f90
fix errors made during merge
Merge branch 'several_MPI_communicators'

Conflicts:
	dissvt.asy