added a draft.
Make some tests pass
Make most of tests pass. The rest may be toot's bug.
Failed tests are here <https://gist.github.com/KeenS/6898642>
Fix the documentation of Clack.Middleware.Dbi and changed the name of parameter key from `:args' to `:connect-args'
Rewrite clackup not to use bordeaux-threads when a pathname is specified as an app.
Allow any CL code to be embed in Clack.Builder:builder.
Add Clack.Middleware.Let and replace Clack.Middleware.Stdout by it.
Add Clack.Middleware.Backtrace as a default middleware. It is a kind of "safety net" for production environment.

By this changes, the debug options of handlers are needless. But I leave them for now.
Fix a bug of Clack.Builder which was contained in f9172d. `builder' couldn't treat NIL in a list of middlewares.
Allow to change where to output in Clack.Middleware.Backtrace.
Delete a test file for Clack.Middleware.Stdout from t-clack.asd.
Add Clack.Http-Status. The package exports 2 symbols, *http-status* (Hash) and http-status-reason (Function).
Fix JSON middleware to recognize Content-Type that specifies a charset (e.g. "application/json; charset=UTF-8")
Merge pull request #65 from olivermg/master

Fix JSON middleware to recognize Content-Type that specifies a charset
Tweaked Clack.Middleware.Dbi.
Fix the indentation.
Fix crashing when no Content-Type given
use eql instead of eq to compare numbers
Merge pull request #66 from olivermg/master

Fix crashing when no Content-Type given
Fix documentations of clack.util.route.