Replace pecan's homegrown interactive debugging middleware with backlash

backlash is a port of Werkzeug's debugger middleware to Webob.  It has no
additional dependencies beyond Webob and is being used by the TurboGears2 team
as an alternative to the antiquated Paste/WebError.  Leveraging this as an
*optional* dependency to pecan would:

* Remove a sizable chunk of code from pecan, some of which is embedded
  JavaScript that packagers have traditionally balked at.
* Improve the interactive debugging experience for developers in a very
  meaningful way (the Werkzeug-based middleware provides features like an
  in-browser console debugger, the ability to load source code on
  a frame-by-frame basis).
* Improve the unified debugging experience amongst several popular Python
  frameworks (some form of the debugging interface will be in use by Flask,
  Pecan, and TurboGears2).

Change-Id: I85f50f677c6052bd2afd32811dedf33835135e12

0 files changed, 0 insertions, 0 deletions