DataMatrix above 44 characters caused application to exit.

[mmulqueen]

When trying to create a DataMatrix that will contain more than 44 characters of text, the application exits (no exception thrown). When using only double digits, up to 88 characters are possible. With the number being somewhere in between if a mixture of ASCII and double digits are used. This bug also exists in huBarcode.

The underlying issue is that PyStrich does not currently support multiple blocks/regions.

[mmulqueen]

This issue has now been significantly improved:

• PyStrich now throws an exception (DataTooLongForImplementation) when it hits the size limit rather than printing "Data too big" and mysteriously exiting.
• PyStrich now supports multiple regions and can support up to 174 characters or 348 digits of data.

Further improvements could be gained by implementing block interleaving. However, I have no plans to implement that at present. Pull requests welcome.