adding NotAuthorized HTTP response code

include/fc/io/json.hpp

@@ -1,9 +1,9 @@
 #pragma once
 #include <fc/variant.hpp>
+#include <fc/filesystem.hpp>
 
 namespace fc
 {
-   class path;
    class ostream;
    class buffered_istream;
 
@@ -54,7 +54,7 @@ namespace fc
          }
 
          template<typename T>
-         static void save_to_file( const T& v, const string& p, bool pretty = true ) 
+         static void save_to_file( const T& v, const std::string& p, bool pretty = true ) 
          {
             save_to_file( variant(v), fc::path(p), pretty );
          } 

include/fc/io/varint.hpp

@@ -27,6 +27,11 @@ struct unsigned_int {
     friend bool operator>=( const unsigned_int& i, const unsigned_int& v ) { return v >= i.value; }
 };
 
+/**
+ *  @brief serializes a 32 bit signed interger in as few bytes as possible
+ *
+ *  Uses the google protobuf algorithm for seralizing signed numbers
+ */
 struct signed_int {
     signed_int( int32_t v = 0 ):value(v){}
     operator int32_t()const { return value; }

include/fc/network/http/connection.hpp

@@ -25,6 +25,7 @@ namespace fc {
         enum status_code {
             OK                  = 200,
             RecordCreated       = 201,
+            NotAuthorized       = 401,
             NotFound            = 404,
             Found               = 302,
             InternalServerError = 500