Analyze the current file when requesting completions

[rohdef]

The current file is almost certainly stale when requesting completion; It should be analysed using
codefinder on-the-fly.

Also, to enhance the first use experience, a PYSMELLTAGS should not be required to do local
completions.
Comment 1 by project member orestis, Nov 5, 2008
First part in github - second part needs more thought.