Release SZ 2.1.12.2
Fix the number of threads issue in sz_omp.c (previously, it has to be multiple of 8; now, the real # threads could be a multiple of 4 instead).
Add SZ_Transpose mode in sz_openmp.c
Fix SZ threadsafe
Fix a small bug in the executable example/sz.c; add CONSTANT_FLAG in write_stats
Support e4s portal
Add a filter -- filterDimension() to deal with the number of elements=1 at some dimension
Revise the SZ package for the builtin integration with HDF5 filter