Add magic header to multipart that fixes go-ipfs errors.

Author: ianopolous

src/main/java/io/ipfs/api/Multipart.java

@@ -23,6 +23,7 @@ public Multipart(String requestURL, String charset) {
             httpConn.setUseCaches(false);
             httpConn.setDoOutput(true);
             httpConn.setDoInput(true);
+            httpConn.setRequestProperty("Expect", "100-continue");
             httpConn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
             httpConn.setRequestProperty("User-Agent", "Java IPFS CLient");
             out = httpConn.getOutputStream();

src/test/java/io/ipfs/api/SimpleAddTest.java

@@ -68,7 +68,6 @@ public void testSingleOnlyHash() throws Exception {
     }
 
     @Test
-    @Ignore("[#95] NPE in simple recursive ipfs add scenario")
     public void testRecursive() throws Exception {
 
         Path path = Paths.get("src/test/resources/html");
@@ -81,7 +80,6 @@ public void testRecursive() throws Exception {
     }
 
     @Test
-    @Ignore("[#95] NPE in simple recursive ipfs add scenario")
     public void testRecursiveOnlyHash() throws Exception {
 
         Path path = Paths.get("src/test/resources/html");