Make package a ROS 2 package

__init__.py

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+"""Reading and interpreting of LTTng trace data."""
+__author__ = 'Luetkebohle Ingo (CR/AEX3)'

conversion/ctf.py

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+
+def ctf_to_pickle():
+    print('ctf_to_pickle')

convert.py

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+#!/usr/bin/env python3
+# Entrypoint/script to convert CTF trace data to a pickle file
+# TODO
+
+from tracetools_analysis.conversion.ctf import *
+
+def main():
+    print('main called')
+    ctf_to_pickle()