add bitset and bitget

src/test/java/redis/clients/jedis/tests/commands/BitCommandsTest.java

@@ -0,0 +1,20 @@
+package redis.clients.jedis.tests.commands;
+
+import org.junit.Test;
+
+public class BitCommandsTest extends JedisCommandTestBase {
+    @Test
+    public void setAndgetbit() {
+        long bit = jedis.setbit("foo", 0, "1");
+        assertEquals(0, bit);
+
+        bit = jedis.getbit("foo", 0);
+        assertEquals(1, bit);
+
+        long bbit = jedis.setbit("bfoo".getBytes(), 0, "1".getBytes());
+        assertEquals(0, bbit);
+
+        bbit = jedis.getbit("bfoo".getBytes(), 0);
+        assertEquals(1, bbit);
+    }
+}