Added File upload support using InputStream, Fixes: Kong#91

Author: varra4u

src/test/java/com/mashape/unirest/test/http/UnirestTest.java

@@ -822,7 +822,7 @@ public void setTimeoutsAndCustomClient() {
 			Unirest.setTimeouts(1000, 2000);
 			fail();
 		} catch(Exception e) {
-			// Ok
+			// Ok 
 		}
 	}