ASDF version 1.0.3

* Allow all ASCII chars in the names of provenance data sets.
* Allow the following extra characters in the names of auxiliary data sets
  and their path names: ``_\.!#$%&*+,:;<=>\?@\^~``

ASDF version 1.0.2

Optionally encode nanoseconds in the dataset names.

ASDF Version 1.0.1

Allow little and big endian 16 bit integer waveform data.

Initial version 1.0.0 of the format.