md_parser.ml: fixing ordered/unordered lists recognition
md_parser.ml: typo in a comment
md_lexer.ml: fix: typo
md_parser.ml: fix in read_title
md_parser.ml: todo comment
md_parser.ml: setext_title rewritten. That (hopefully) fixes the bug with setext-style titles.
md_parser.ml: fix in hr_m (hr were not properly recognized in some cases)
md_lib.ml: adding the Html_block constructor to differenciate inlined HTML from block HTML (this means that the Html constructor is for inline HTML)
adding the Html_block constructor to differenciate inlined HTML from block HTML (this means that the Html constructor is for inline HTML)
md_parser.ml: using the new Html_block constructor for block HTML