Accept magnet url's in Add screen.

android/src/org/transdroid/gui/Add.java

@@ -94,6 +94,8 @@ public class Add extends Activity {
 			return;
 		}
 		
+		// Magnet scheme is not supported by java.net.URL so instead we consider this to be okay manually
+		if (urlText != null && !urlText.startsWith("magnet")) {
 			// Check URL structure
 			try {
 				new URL(urlText); // Nothing is actually done with it; only for parsing
@@ -101,6 +103,7 @@ public class Add extends Activity {
 				Toast.makeText(this, R.string.no_valid_url, Toast.LENGTH_SHORT).show();
 				return;
 			}
+		}
 		
 		// Create a result for the calling activity
 		Intent i = new Intent(this, Torrents.class);