Fixed bug where moving leading whitespace to an outer element ended up one element prior to where it should be.
Added graphviz converter
updated documentation
Idml story: remove any elements that contain only blank text elements. This is to prevent double asterisk issues.
Defined more Kramdown::Options for validating parsers.
Added IDML story specs
Added position information (story and line) to Kramdown::Parser::IdmlStory
Added validation hooks to Kramdown::Parser::IdmlStory
Made method argument names consistent with rest of library