Stop relying on the message text of ZeroDivisionError in tests.

The test for broken_repr relied on the message text of
ZeroDivisionError, which is different on pypy (just "integer
division", not "integer division or modulo"). This causes a test
failure. Fix this by explicitly raising an exception with a message we
provide.
Fix an error when using 'adhoc' as ssl_context
Update docs for FileStorage
Fix for issue #239
Added '+' to always_safe
Added the example url from the test to the testsuite.
Fix some typos and text in HTTP Utilities

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Remove circular link to documentation root

On http://werkzeug.pocoo.org/docs/,
http://werkzeug.pocoo.org/documentation/ links back to
http://werkzeug.pocoo.org/docs/

Maybe it linked to previous versions' docs before?

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Add link to community page in Installation intro

Where it says to contact devs if you want to use Python 3
Fix few typos and little things on Transition page



Signed-off-by: Timothée Boucher <timothee@gmail.com>
Fix typos, punctuation and missing word in Tutorial

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Fix typo in "API Levels"

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Fix some typos and punctuation in Quickstart

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Fix typo in Transition

Signed-off-by: Timothée Boucher <timothee@gmail.com>
Fix handling of URL fragments.

Encode and decode URL fragments in iri_to_uri() and uri_to_iri().
Test anchor encoding/decoding in test_iri_support.
fixed #232
Support for absolute URLs in HTTP requests.

Props to @rodsenra for the original fix at #248
Renamed LighttpdCGIRootFix to simply CGIRootFix

  - It is easier to spell. Seriously.
  - The problem is not limited to Lighttpd (See mitsuhiko/flask#680)
  - I added a parameter to specify a custom app root. This is the change
    i am a bit unsure about.
Factor out tuple production.
MultiPartParser.cls receives parsed forms/files lazily.
yield_file/yield_form now overkill.