Boost beast

This commit is the beginings of attempting to transition away from
crow, and toward boost::beast.  Unit tests are passing, and
implementation appears to be slightly faster than crow.

Change-Id: Ic8d946dc7a04f514c67b1098f181eee1ced69171
diff --git a/crow/include/crow.h b/crow/include/crow.h
index 94e7995..28d46b6 100644
--- a/crow/include/crow.h
+++ b/crow/include/crow.h
@@ -1,22 +1,17 @@
 #pragma once
 #include "crow/query_string.h"
-#include "crow/http_parser_merged.h"
-#include "crow/ci_map.h"
-#include "crow/TinySHA1.hpp"
 #include "crow/settings.h"
 #include "crow/socket_adaptors.h"
-#include "crow/mustache.h"
 #include "crow/logging.h"
-#include "crow/dumb_timer_queue.h"
+#include "crow/timer_queue.h"
 #include "crow/utility.h"
 #include "crow/common.h"
 #include "crow/http_request.h"
 #include "crow/websocket.h"
-#include "crow/parser.h"
 #include "crow/http_response.h"
-#include "crow/middleware.h"
 #include "crow/routing.h"
 #include "crow/middleware_context.h"
 #include "crow/http_connection.h"
 #include "crow/http_server.h"
-#include "crow/app.h"
\ No newline at end of file
+#include "crow/app.h"
+#include "boost/beast/core.hpp"