Demo update and start counting tests times

-Fixed performance issue with multithreading and rendering
-start making better shaders (by using many macros)
-speed up rendeing when maximum objects count was reached
-remove map rendering form Snake demo, and render entities by themself
-start adding depth and color rendering parameters
-added properly names to jobs (for debugging purpses)
-starts adding multithreaded rendering
-added some math to vectors
-changes execute() to willExecute(). Probably should have different name.

tests/runner.d

@@ -9,6 +9,8 @@ import bubel.ecs.vector;
 import bubel.ecs.simple_vector;
 import bubel.ecs.std;
 
+import tests.time;
+
 enum int ASSERTED = 123;
 enum string OUT_FILE = "test_report.xml";
 
@@ -95,6 +97,8 @@ struct TestRunner(Args...)
                 write(test.name);
                 write("\" classname=\"");
                 write(suite.name);
+                write("\" time=\"");
+                write(cast(double)test.time*0.000001);
                 write("\">");
                 if (test.msg)
                 {
@@ -189,8 +193,10 @@ struct TestRunner(Args...)
                     }
                     else
                     {
+                        long time = Time.getUSecTime();
                         unittest_();
                         test.passed = true;
+                        test.time = cast(int)(Time.getUSecTime() - time);
                     }
                 }
                 else
@@ -281,6 +287,14 @@ struct TestRunner(Args...)
         junit.add(cast(ubyte[]) txt);
     }
 
+    void write(double num)
+    {
+        ubyte[40] buffer;
+        int len;
+        len = sprintf(cast(char*) buffer.ptr, "%2.8lf", num);
+        junit.add(buffer[0 .. len]);
+    }
+
     void write(uint num)
     {
         ubyte[20] buffer;