expose bug: zero length arrays unsupported (#17)
fix code and tests to support zero length arrays
test zero length files on the command line too
changelog entry for bugfix
expose bug when chunk_size not divisible by itemsize (#18)
add a new exception type for this kind of mismatch
raise the exception
fix the text by checking for the exception being raised
Merge branches 'vh/bugfix/ensure_chunk_size_divisble_by_typesize' and 'vh/bugfix/support-zero-length-arrays' into maint-0.7.x

* vh/bugfix/ensure_chunk_size_divisble_by_typesize:
  fix the text by checking for the exception being raised
  raise the exception
  add a new exception type for this kind of mismatch
  expose bug when chunk_size not divisible by itemsize (#18)

* vh/bugfix/support-zero-length-arrays:
  changelog entry for bugfix
  test zero length files on the command line too
  fix code and tests to support zero length arrays
  expose bug: zero length arrays unsupported (#17)