update todos

main.py

@@ -10,8 +10,9 @@ description = """This is a space testing a method for evaluating the quality of
 Currently unhandled features:
 * PIC stuff
   * Global references
-  * Function calls
+  * Internal function calls
   * Wildcards in target function?
+* External function calls (e.g., printf)
 * How to extract compilable decompilation from decompilers?
 """