Move xsd2sch to separate repository

[tgraham-antenna]

xsd2sch should be moved to a separate repository under the Schematron organisation.

Subversion lets you checkout part of a project -- e.g., just the xsd2sch part -- but Git doesn't. OTOH, Git, like Subversion, lets you have external submodules.

It would be cleaner if xsd2sch was in a separate repository that, if necessary, included the XSLT implementation as a submodule.

https://github.com/webb/schematron-impl, for example, is a fork of this repository where everything other than the XSLT implementation has been removed. This repository should end up like that.

[rjelliffe]

Yes, good idea