Fixup the 'check' target.
Implement symbol emitting
Actually test things in the generation tests.
Add sequence YAML tests.
Add sequence_list YAML tests.
Add production operator==
Merge branch 'master' into yaml
Add production YAML emit.
Remove diff tests since yaml-cpp's key ordering is a lot less stable than I expected.
Clean up test infrastructure
Add operator== for grammar.
Merge branch 'master' into yaml
Add some grammar accessors.
Merge branch 'master' into yaml
Add grammar YAML emit
Don't require additional headers for sample grammars
Add sample yaml file generator
Simplify YAML format a little.