#5 support enums

examples/docs/README.md

examples/docs/constants.schema.md

examples/docs/custom.schema.md

examples/docs/deepextending.schema.md

examples/docs/definitions.schema.md

examples/docs/enums.schema.md

examples/docs/example.schema.md

examples/docs/examples.schema.md

examples/docs/extending.schema.md

examples/docs/simple.schema.md

examples/docs/simpletypes.schema.md

examples/generated-schemas/enums.schema.json

examples/schemas/enums.schema.json

lib/markdownWriter.js

templates/md/property.ejs