Make WADL Tools aware of rax:preprocess extension.

This allows us to catche errors with broken links when using the
extension.
Merge pull request #114 from RackerWilliams/rax_preprocess

Make WADL Tools aware of rax:preprocess extension.
Whoops, missed simplifed XSLTs in rax:preprocess extension.
Merge pull request #115 from RackerWilliams/simple_xslt

Whoops, missed simplifed XSLTs in rax:preprocess extension.
Ensure that unparsed references make it to the schematron reports.
Merge pull request #116 from RackerWilliams/unparse_detect

Ensure that unparsed references make it to the schematron reports.
Whoops, fixed issue where test samples are in the wrong directory.
Merge pull request #117 from RackerWilliams/move_samples

Whoops, fixed issue where test samples are in the wrong directory.
Fixed error where unparsed text in includes results in false error msg.
Merge pull request #118 from RackerWilliams/no_error_on_unparse

Fixed error where unparsed text in includes results in false error msg.
Capture entity, xinclude, and sample dependencies in svrl report.

This patch also has the side effect of providing much friendlier error
messages when one of the above links is broken.
Merge pull request #119 from RackerWilliams/ent

Capture entity, xinclude, and sample dependencies in svrl report.
Ensure that we performe additional checks once per systemId.
Merge pull request #120 from RackerWilliams/check_once

Ensure that we performe additional checks once per systemId.
Update Saxon to latest 9.4 patch release.
Merge pull request #121 from RackerWilliams/saxon_up

Update Saxon to latest 9.4 patch release.