Fix build for Windows

Move mmap binary reader to UNIX only architectures, fixes #122

Update binary reader

JS: fix parsing of async variable when async function is not allowed

JS: allow lexer to continue after unexpected character, see #118

Fix writing JSON from minified JS; allow !0 => true and !1 => false a…

…s well as: no substitution template literal => string; fixes #685

HTML: keep original quote when isXML is set; merge isXML with mustQuo…

…te; don't add quotes if not originally present

JS: fix memory bug in ast.JSString() function

JS: keep all bang-comments (including in expressions) and move to top…

… of statement list

JS: fix JS() output with Integer.Identifier