commonmark.js 0.18.1

• Added nextNonspace, blank, indent properties to Parser.
• Factored out advance-to-nonspace code into findNextNonspace.
• Put block starts into blockStarts property of Parser. Now
  almost all block-specific material has been moved out of
  incorporateLine.
• Removed parameter from addLine.
• Simplified code, removed matchAt.
• Small optimization in entityToChar
• Use charCodeAt in a few places where charAt was used.
• Added peek() function in blocks. This ensures we check bounds
  before calling charCodeAt.
• Use peek instead of raw charCodeAt in inlines.js.
• Dingus improvements:
  • Use ACE editor in dingus. Implemented L->R sync scroll. Also,
    the block containing the cursor is highlighted on the right.
  • Split code from dingus.html into separate file dingus.js.
  • Split CSS into separate file, dingus.css.
  • Added debounce.
  • Moved dingus code to dingus/ directory. dingus/Makefile
    builds commonmark.js in the dingus directory. So to deploy,
    you just need to copy the dingus directory.
  • Use local copies of js dependencies. Instead of including these in
    the repository, though, we have the Makefile install them with bower.
  • Fixed one-off error in line number calculation.
  • XML and HTML are now same font size.
  • Allow line wrapping in editor.
  • AST window now scrolls like HTML window.
• Updated reNonSpace for new whitespace definition in spec.
• Added smart punctuation parsing option.
  • Added options param to InlineParser. options.smart triggers
    smart punctuation parsing.
  • Added --smart option to bin/commonmark.
  • Implemented "smart" parsing of dashes, ellipses, quotes. The
    algorithm is the same as in cmark.
  • Renamed handleEmphasis -> handleDelims.
  • Added benchmark with smart.
  • Added checkbox for smart to dingus.
• Fixed code example for walk.
• Made isContainer a getter to conform to README (#7).
• Allow list start number of 0 in HTML writer (#10).
• Fixed use of isContainer in XML writer.
  isContainer is now a getter, not a function.