Remove reference to taxonomy example from top section.

Created by: absoludity

Fixes #366 (closed) by updating the top section to refer to the now-released 0.6.1 svc context, schema and sample instance, rather than the generated taxonomy structure and vocabulary (which is still used further down the page under the "Conformity topic classification" heading.

Other changes are either typos (adding missing non-trailing space) or my editor removing trailing spaces.