added Grid.h5 from hdfeos5 testdrivers
return [] from gdinqfields for fieldlist methods if the grid has no fields
added support for polar stereographic grid, closes #12
merge branch 'issue12' into devel
added support for printing utm grid, closes #13
merge branch 'issue13' into devel
added printing of spheroid, closes #14
merge branch 'issue14' into devel
require support for more numpy datatypes, closes #10
merge branch 'issue10' into devel
gdinqgrids must return [] if there are no grids in file, closes #15
merge branch 'issue15' into devel
add HDF4 sample files to test suite, closes #16
merge branch 'issue16' into devel