make BString accept String

src/main/java/com/mykola2312/retracker/bencode/BString.java

@@ -10,6 +10,10 @@ public class BString extends BValue {
 		this.bytes = bytes;
 	}
 	
+	public BString(String text) {
+		this.bytes = text.getBytes(StandardCharsets.UTF_8);
+	}
+	
 	@Override()
 	public boolean compare(BValue other) {
 		return Arrays.equals(((BString)other).get(), get());

src/test/java/com/mykola2312/retracker/bencode/EqualsTest.java

@@ -11,4 +11,10 @@ public class EqualsTest {
 		assertEquals(new BInteger(1), new BInteger(1));
 		assertNotEquals(new BInteger(2), new BInteger(3));
 	}
+	
+	@Test
+	public void testStringEquals() {
+		assertEquals(new BString("first"), new BString("first"));
+		assertNotEquals(new BString("first"), new BString("second"));
+	}
 }