request parser rewrite + added tests

* rewrote request parser, now more simplified and theoretically faster
* added gtest and an example test to measure parser times

tests/speed_tests.cpp

@@ -0,0 +1,28 @@
+#include <gtest/gtest.h>
+#include <fstream>
+#include <chrono>
+#include "../lib/http/request.hpp"
+
+
+TEST(speed_tests, request_parse) {
+    using std::chrono::high_resolution_clock;
+    using std::chrono::duration_cast;
+    using std::chrono::duration;
+    using std::chrono::milliseconds;
+
+    std::ifstream t("./test_files/test_request.http");
+    std::stringstream buffer;
+    buffer << t.rdbuf();
+    std::string raw_req = buffer.str();
+
+    auto t1 = high_resolution_clock::now();
+    for(int i = 0; i < 1000000; ++i) {
+        volatile anthracite::http::request req (raw_req, "0.0.0.0");
+    }
+    auto t2 = high_resolution_clock::now();
+
+    /* Getting number of milliseconds as an integer. */
+    auto ms_int = duration_cast<milliseconds>(t2 - t1);
+
+    std::cout << "Parsed 1 Million requests in " << ms_int << "ms" << std::endl;
+}

tests/test_files/test_request.http

@@ -0,0 +1,13 @@
+GET /foo/bar?test=a&test2=b HTTP/1.1
+Host: example.org
+User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; fr; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
+Accept: */*
+Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3
+Accept-Encoding: gzip,deflate
+Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
+Keep-Alive: 115
+Connection: keep-alive
+Content-Type: application/x-www-form-urlencoded
+X-Requested-With: XMLHttpRequest
+Referer: http://example.org/test
+Cookie: foo=bar; lorem=ipsum;