New header-only basic_parser:

The basic_parser is rewritten to be header-only. The nodejs parser is
removed from the include subtree and placed into the test directory.
Other changes:

* Parser specific error codes in parse_error.hpp
* Add parser-bench performance testing, nodejs vs beast
* New random message generator for fuzz tests
* Test for header-only parser using random message generator
* Augmented some existing message tests to check more cases

test/http/nodejs_parser.cpp

@@ -0,0 +1,17 @@
+//
+// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifdef _MSC_VER
+# pragma warning (push)
+# pragma warning (disable: 4127) // conditional expression is constant
+# pragma warning (disable: 4244) // integer conversion, possible loss of data
+#endif
+#include "nodejs-parser/http_parser.c"
+#ifdef _MSC_VER
+# pragma warning (pop)
+#endif
+