h4h5tools

Handle EOS swath and fix many EOS grid bugs
  - make EOS swath conform to CF convention
  - EOS test-suite including about 30 grid and swath files and expected results
    - for grid: both 2d and 1d projections with different order (YX or XY)
    - for swath: various settings on dimensional maps
  - fix a bug that does not print accumulated error messages to stderr

It works various cases, and for 48 nsidc real files, it was not crashed. (I'm checking correctness.)

  Perforce @207 ~  @250