add signatures for functions working on attribute arrays
consistent indentation with indent -linux
tweak signatures to align with data and create stubs in napi.c
export new symbols
add functionless stubs for all backends and connect with napi
test now passes, but it surely doesn't work correctly

need to write better tests next
writing numerical attribute arrays now works in hdf5

(test cases haven't been updated yet, so they appear to fail)
Strings are outstanding
nothing dog done for reading
fix wrong naming of new api functions in hdf4

obvious cut and paste error
Merge branch 'master' into attributearrays
print something temporarily
cosmetic change: Test HDF5 first as it is the primary backend
add stub work separating tests for new api from existing tests
remove attra specific stuuf out of napi_test so that should keep working
comment out failing conversions to HDF4
generate better testing stub for attra

make it pass for hdf4 and xml for now
Merge branch 'master' into attributearrays
remove some warnings
hdf5 test now "working"

as in: fails but highlights deficiencies in the code
place comment next to broken code
getting the attribute information correctly now

reading attribute doesn't work for rank == 0