Document repeated fields.
Document enumerated fields.
Better table of contents handling.
Document Variably Typed Container Frame.
Start documenting normal field options.
Merge pull request #10 from dylan-lang/documentation

Documentation
Link to docs from README.
Switch to "variably-typed field" from "variably-typed-field".

This makes the field type naming patterns consistent.
Add example for variably-typed-field.
Stub new section for extending binary-data.
Stub out frame options documentation.
Merge pull request #12 from dylan-lang/documentation

Documentation updates
Merge pull request #13 from dylan-lang/variably-defined-field

Switch to "variably-typed field" from "variably-typed-field".
[doc] Update for change 4b67cec, 'variably-typed field'.
[doc] Clarify that enum types are int <-> sym.
Merge pull request #14 from dylan-lang/documentation

Documentation
cleanup frame-size vs field-size
provide a stricter contract to parse-frame. and fix one implementation thereof
more documentation about this library
further improvements, and a note on efficiency