tools: Add README.md file to explain this directory.
tools/server_lib contains files copied as-is, or with minor
modifications, from the zulip/zulip repository when the api
code was split into this separate repository.
ADD
tools/server_lib/README.md
+# Server Lib
+
+This directory contains file copied as is from the [zulip server repository](https://github.com/zulip/zulip) as they were on the commit `343cb20d570a8f5c1f5b6e6842058b294a376593`.
+
+## List of copied files
+
+Any changes made to these files have been marked using git's conflict markers in the files.
+
+1. `lister.py` <- `zulip/tools/lister.py` - No changes
+2. `printer.py` <- `zulip/tools/linter_lib/printer.py` - Minor changes

ADD
tools/server_lib/__init__.py
tools/server_lib/__init__.py
tools: Add README.md file to explain this directory.

tools/server_lib contains files copied as-is, or with minor
modifications, from the zulip/zulip repository when the api
code was split into this separate repository.