Add Vela codebase

 - Added modules ethosu.vela and ethosu.mlw_codec.
 - Added README and various configuration files.

Change-Id: I3690f8c8f5966306ecddaeb2793c30ca9c6e2eee
diff --git a/ethosu/mlw_codec/mlw_encode.h b/ethosu/mlw_codec/mlw_encode.h
new file mode 100644
index 0000000..a995ac6
--- /dev/null
+++ b/ethosu/mlw_codec/mlw_encode.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2020 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+
+#ifndef __MLW_ENCODE_H__
+#define __MLW_ENCODE_H__
+
+#ifdef _MSC_VER
+  #define EXPORTED __declspec(dllexport)
+#else
+  #define EXPORTED __attribute__((visibility("default")))
+#endif
+
+#if __cplusplus
+extern "C"
+{
+#endif
+
+EXPORTED
+int mlw_encode(int16_t *inbuf, int inbuf_size, uint8_t **outbuf, int verbose);
+
+EXPORTED
+void mlw_free_outbuf(uint8_t *outbuf);
+
+#if __cplusplus
+}
+#endif
+
+#endif