v1.1.3

• Improve read_from_source() to support an optional CWD parameter used to
  look for the OpenAPI spec. The OpenAPI plugin should supply that CWD relative
  to the current markdown file being processed. Markdown customarily uses
  paths relative to the document itself. Existing relative paths will not break,
  since this will attempt paths relative to both working directories, by
  @joewlambeth.
• Add possibility to enforce row or col span PR #74,
  by @BFuhry.