Revert "CodeSynthesis XSD library (take 2)"

[nickerso]

Reverts cellml/libcellml#33 since that should have been to the develop branch rather than master.

[mirams]

Oops, sorry, bit confused why the develop is behind master?

[nickerso]

Again, it will be clear once the development process document is written - but the idea is something like all the work is done on develop and master (or maybe a release branch) will be updated when releases are made. So until the first release master will be effectively empty.

The problem here was that Randall (@codecurve) submitted the pull request to the wrong brunch and then I missed that in the "review". Executing the merge once the review is all done was the correct thing to do :)

[codecurve]

It might be worth trying setting "develop" as the default branch, maybe that would mean that pulls default to that target. However, that means that rendered markup etc. would be the content on that branch too.