Demo cleanup
Refactored demo build scripts
Demo: permalink, autoprefixer
Demo: added options support
Demo: set text area & ouput boxes to full height
Fix: whitespace in links element can contain newlines
Fix: "\*" isn't a part of a emphasis marker sequence
Workaround for a bug with nested list elements tightness
Update tests
Demo: updated css & browser js files
Updated demo text style
Add tokenizeSingle method
Add single-rule test cases
Add state.level everywhere
Added syntax highlight support for fenced blocks
Should fix ssl for demo
Docs update
Move parse_reference to its own file

+ change its signature
Rename "lexer" to "parser"

and move rules from lexer_* to rules_*
Renamed main class & file