Major cleanups and changes, see changelog/changeset for full details.

pdb support in threaded mode, replaced the crash handler with a verbose traceback printer for threaded shells.

Fix tab-completion bug in threaded shells.x

- Make autoedit_syntax true by default - Add Ville's patch for better backslash handling in paths.

Turn quit/exit into magics instead of special-cased strings

Fix changelog, broken in previous commit

Added support for automatically reopening the editor if the file had a syntax error in it. Thanks to scottt who provided the patch at: http://www.scipy.net/roundup/ipython/issue36 (slightly modified version committed).

Add support for multiline input with blank lines in it. Closes issue 43.

Cosmetic cleanups: put all imports in a single line, and sort them alphabetically. This will make it easier to see/clean dependencies as we start copying stuff into chainsaw.

- Big iplib cleanups, moved all tab-completion functionality to its own module (IPython.completer). - Added support for 'quit/exit' doing the intuitively correct thing. - IPython doesn't depend on code.py anymore (it doesn't even import it). At this point it was only a matter of copying two methods. This gives us a standalone object which we can clean up/refactor at ease.