Fixed some includes

src/bakatools/container/data_stream.h

@@ -2,7 +2,7 @@
 
 #include <bakatoolspch.h>
 
-namespace Bk::Net {
+namespace Bk {
 	class DataStream 
 	{
 	public:

src/bakatools/time/time_point.h

@@ -4,6 +4,11 @@
 #include "time_span.h"
 
 namespace Bk {
+    using SysClock = std::chrono::system_clock;
+    using SteadyClock = std::chrono::steady_clock;
+    using FileClock = std::chrono::file_clock;
+    using UtcClock = std::chrono::utc_clock;
+    
     template<typename C, typename P>
     struct TimePoint
     {

src/bakatools/time/time_span.h

@@ -11,11 +11,6 @@ namespace Bk {
     using Hour = std::ratio<3600, 1>;
     using Day = std::ratio<84600, 1>;
 
-    using SysClock = std::chrono::system_clock;
-    using SteadyClock = std::chrono::steady_clock;
-    using FileClock = std::chrono::file_clock;
-    using UtcClock = std::chrono::utc_clock;
-
     template<typename P>
     struct TimeSpan 
     {