Fixed length strings in attributes
Created by: dominikwerder
Description of work
Improve support for fixed length string attributes as described in docs/attributes.md
.
Used and tested so far on the AMOR instrument as part of branch amor
.
Unit Tests
New unit tests include HDFFile.createStaticDatasetsStrings
and HDFFileAttributesTest.ArrayOfAttributesWithFixedLengthStringItIsWrittenAsFixedLengthStrings