Add basic conversion entrypoint

convert.py

@@ -2,8 +2,18 @@
 # Entrypoint/script to convert CTF trace data to a pickle file
 # TODO
 
+import sys
+from pickle import Pickler
 from tracetools_analysis.conversion.ctf import *
 
-def main():
-    print('main called')
-    ctf_to_pickle()
+def main(argv=sys.argv):
+    if len(argv) != 3:
+        print("usage: /trace/directory pickle_target_file")
+        exit(1)
+
+    trace_directory = sys.argv[1]
+    pickle_target_file = sys.argv[2]
+
+    with open(pickle_target_file, 'wb') as f:
+        p = Pickler(f, protocol=4)
+        ctf_to_pickle(trace_directory, p)