Update all new Tasks

Task/File-input-output/D/file-input-output-1.d

@@ -0,0 +1,5 @@
+import std.file: copy;
+
+void main() {
+    copy("input.txt", "output.txt");
+}

Task/File-input-output/D/file-input-output-2.d

@@ -0,0 +1,15 @@
+import std.stdio;
+
+int main() {
+    auto from = File("input.txt", "rb");
+    scope(exit) from.close();
+
+    auto to = File("output.txt", "wb");
+    scope(exit) to.close();
+
+    foreach(buffer; from.byChunk(new ubyte[4096*1024])) {
+        to.rawWrite(buffer);
+    }
+
+    return 0;
+}

Task/File-input-output/D/file-input-output-3.d

@@ -0,0 +1,9 @@
+import tango.io.device.File;
+
+void main()
+{
+    auto from = new File("input.txt");
+    auto to = new File("output.txt", File.WriteCreate);
+    to.copy(from).close;
+    from.close;
+}

Task/File-input-output/D/file-input-output-4.d

@@ -0,0 +1,7 @@
+import tango.io.device.File;
+
+void main()
+{
+    auto to = new File("output.txt", File.WriteCreate);
+    to.copy(new File("input.txt")).close;
+}