fix according #150 pr

pre-commit-hooks/convert_markdown_into_ipynb.sh

+#!/bin/sh
+command -v go >/dev/null 2>&1
+if [ $? != 0 ]; then
+    echo -e >&2 "Please install https://golang.org/doc/install#install"
+    exit 1
+fi
+
+#convert to ipynb file
+GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
+
+for file in $@ ; do
+	/tmp/go/bin/markdown-to-ipynb < $file > ${file%.*}".ipynb"
+    if [ $? != 0 ]; then
+        echo -e "markdown-to-ipynb $file error"
+        exit 1
+    fi
+done
+

tools/convert-markdown-into-ipynb-and-test.sh

+#!/bin/sh
+command -v go >/dev/null 2>&1
+if [ $? != 0 ]; then
+    echo >&2 "Please install go https://golang.org/doc/install#install"
+    exit 1
+fi
+
+GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
+
+cur_path=$(dirname $(readlink -f $0))
+cd $cur_path/../
+
+#convert md to ipynb
+for file in */{README,README\.en}.md ; do
+    /tmp/go/bin/markdown-to-ipynb < $file > ${file%.*}".ipynb"
+    if [ $? != 0 ]; then
+        echo >&2 "markdown-to-ipynb $file error"
+        exit 1
+    fi
+done
+
+if [[ ! -z $TEST_EMBEDDED_PYTHON_SCRIPTS ]]; then
+    exit 0
+fi
+
+#exec ipynb's py file
+for file in */{README,README\.en}.ipynb ; do
+    pushd $PWD > /dev/null
+    cd $(dirname $file) > /dev/null
+
+    echo "begin test $file"
+    jupyter nbconvert --to python $(basename $file) --stdout | python
+
+    popd > /dev/null
+    #break
+done