[dfmc-reader] Remove unused <template-closure>

This was marked for removal in 1997. Safe now.
Merge pull request #672 from dylan-lang/remove-template-closure

[dfmc-reader] Remove unused <template-closure>
[doc,c-ffi] Fix formatting errors.
Bump testworks submodule to include benchmarks.
[doc] Formatting: Add bullet lists.
[doc] Add release note for testworks benchmarks.
Bump strings submodule.
Merge pull request #675 from cgay/relnotes

Release notes updates
[doc,duim] Fix a variety of formatting issues.
[doc,duim] Fix extra space before periods.
[doc,io] Fix typo.
Make *-test-suite-app libraries live with the sources they test.
Merge pull request #677 from cgay/qa

Make *-test-suite-app libraries live with the sources they test.
Bump testworks submodule to get allocation output.
trace next-computation when inlining correctly
do not include the node-id in the structured output
improve tracing: environment-setter traces the computation,
further fixes and safety improvements
Merge pull request #678 from hannesm/more-fixes

More fixes
[dfmc,c-ffi] Add objc-selector-definer.

This is similar to c-function-definer, but sets up things for
simplifying usage of the objc-dylan bridge library.

This duplicates some parts of c-function-definer and re-uses many
parts of it.
Merge pull request #674 from dylan-lang/c-ffi-changes

[dfmc,c-ffi] Add objc-selector-definer.