[Java] Contributing page.

Author: mjpt777

CONTRIBUTING.md

@@ -0,0 +1,33 @@
+# Contributing to SBE
+
+If you would like to contribute code you can do so through GitHub by sending a pull request or raising an issue with an attached patch.
+
+When submitting code, please make every effort to follow existing conventions and style in order to keep the code as readable as possible.
+
+## License
+
+By contributing your code, you agree to license your contribution under the terms of the APLv2:
+ 
+https://github.com/real-logic/simple-binary-encoding/blob/master/LICENSE
+
+All files are made available under the Apache 2.0 license.
+
+If you are adding a new file it should have the following header:
+
+```
+/*
+ * Copyright 2013-2019 Real Logic Limited.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ ```

README.md

@@ -129,7 +129,7 @@ Developers wishing to enhance the CSharp generator should see the [developer doc
 
 License (See LICENSE file for full license)
 -------------------------------------------
-Copyright 2014-2019 Real Logic Limited  
+Copyright 2013-2019 Real Logic Limited  
 Copyright 2017 MarketFactory Inc
 
 Licensed under the Apache License, Version 2.0 (the "License");