Add WAMR API bindings in Python (#1959)

Before adding the new bindings:
1. Moved wasm-c-api in a subfolder wasmcapi in the package.
2. Adapted the tests to be able to run in this new structure.

New:
1. Added the WAMR API in another folder wamrapi in the same level as wasm-c-api.
2. Created an OOP proposal.
3. Added an example using this proposal.

language-bindings/python/utils/create_lib.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+CUR_DIR=$(cd $(dirname $0) && pwd -P)
+ROOT_DIR=${CUR_DIR}/../../..
+
+WAMR_BUILD_PLATFORM=${WAMR_BUILD_PLATFORM:-"linux"}
+
+cd ${ROOT_DIR}/product-mini/platforms/${WAMR_BUILD_PLATFORM}
+
+mkdir -p build && cd build
+cmake ..
+make -j
+
+cp libiwasm.so ${CUR_DIR}/../src/wamr/libs