-multithreading jobs dependencies:

*system has arrays of read only and modified components
 *new attribute "readonly" usable for variables which should be visible as read only. Const can be used instead for enable checks by compiler.
 *JobGroup was added. JobGroup contain array of jobs and array of dependencies (JobGroups)
 *new function generateDependencies() generate exclusion between systems, and then generate dependencies for SystemCallers and JobGroups
-fixed issue with jobs generating (empty blocks with only newly added entities was used, and led to crash)
-fixed small typo mistake

tests/tests.d

@@ -131,7 +131,7 @@ int main()
 			size_t length;
 			TestComp[] test;
 			TestComp2[] test2;
-			@optional TestComp3[] test3;
+			@readonly @optional const(TestComp3)[] test3;
 			//@absent TestComp4[] test4;
 		}
 
@@ -208,7 +208,7 @@ import std.meta;
 		static struct EntitiesData
 		{
 			short length;
-			Entity[] entity;
+			const (Entity)[] entity;
 			TestComp3[] test;
 			//@absent TestComp[] testt;
 		}
@@ -256,9 +256,9 @@ import std.meta;
 		}*/
 	}
 
-	void dispatch(EntityManager.Job[] jobs)
+	void dispatch(EntityManager.JobGroup jobs)
 	{
-		foreach(job;jobs)
+		foreach(job;jobs.jobs)
 		{
 			//writeln(job);
 			job.execute();
@@ -366,6 +366,8 @@ import std.meta;
 
 	gEM.registerSystem!TestSystem2(0);
 
+	gEM.generateDependencies();
+
 	//assert(*(cast(EntityID*)(cast(void*)tmpl.info.first_block+24)) == EntityID(1,1));
 	//assert(*(cast(EntityID*)(cast(void*)tmpl.info.first_block+48)) == EntityID(1,1));