add readme and requirements

Author: VShawn

readme.md

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+# Step to use
+
+1. `pip install -r requirements.txt`
+2. edit csv file e.g. `glossary_for_PRemoteM.csv`, add a new column with the name of the language code and name.
+3. set proxy if needed in the `glossary_maker.py` `if __name__ == '__main__':`
+
+    ```python
+        http_proxy = SyncHTTPProxy((b'http', b'127.0.0.1', 1080, b''))
+        proxies = {'http': http_proxy, 'https': http_proxy}
+        translator = Translator(proxies=proxies)
+    ```
+
+4. run script `python glossary_maker.py` and it will create a new csv file with the translation result.

requirements.txt

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+googletrans==3.1.0a0
+httpcore==0.9.1