-added SimpleVector (vector with only ubyte data)

-components adding and removing now use SimpleVector (optimalization)

source/ecs/simple_vector.d

@@ -0,0 +1,66 @@
+module ecs.simple_vector;
+
+import std.experimental.allocator;
+import std.experimental.allocator.mallocator;
+
+import core.stdc.string;
+
+struct SimpleVector
+{
+
+    @disable this(this);
+
+    void add(ubyte el) nothrow @nogc
+    {
+        while(used >= data.length)
+        {
+            if(data is null)data = Mallocator.instance.makeArray!ubyte(1024);
+            else Mallocator.instance.expandArray(data,data.length);
+        }
+        data[used++] = el;
+    }
+
+    void add(ubyte[] el) nothrow @nogc
+    {
+        while(used + el.length >= data.length)
+        {
+            if(data is null)data = Mallocator.instance.makeArray!ubyte(1024);
+            else Mallocator.instance.expandArray(data,data.length);
+        }
+        memcpy(data.ptr + used, el.ptr, el.length);
+        used += el.length;
+    }
+
+    size_t length() nothrow @nogc
+    {
+        return used;
+    }
+
+    export ref ubyte opIndex(size_t pos) nothrow @nogc
+    {
+		return data[pos];
+	}
+
+	export ubyte[] opSlice() nothrow @nogc
+    {
+		return data[0 .. used];
+	}
+
+	export ubyte[] opSlice(size_t x, size_t y) nothrow @nogc
+    {
+		return data[x .. y];
+	}
+
+	export size_t opDollar() nothrow @nogc
+    {
+		return used;
+	}
+
+    void clear() nothrow @nogc
+    {
+        used = 0;
+    }
+
+    ubyte[] data = null;
+    size_t used = 0;
+}