Added ExplicitLink and Image lexicons
Updated __escape__ pattern to include all special characters so far.
Refactored some lexicons to follow the same register style, thru inlineBetween/inlineReplace/inlineRegexp.
Added suspicious link determination if the display text looks like a link yet being different from the actual link.
Added title annotation for explicit link lexicon
Added block level list and table lexicon.
Ready for stopping messing up with markdown-js
Started refactoring