Remove a case that is no longer reachable in encodings.py.

This case was originally designed to handle Exception's which didn't gracefully support coercing themselves to unicode. However, because it lives in the `else` case of `if hasattr(s, '__unicode__'):` we can be sure it's no longer reachable in djanog anymore, because since Python 2.5 exception has subclassed object, which means Exception objects always have an __unicode__ method.
Fixed #18796 -- Refactored conversion to bytes in HttpResponse

Thanks mrmachine for the review.
Add 'page_kwarg' attribute to `MultipleObjectMixin`, removing hardcoded 'page'.
Test for `ListView.page_kwarg`
Fixed #19102 -- Fixed fast-path delete for modified SELECT clause cases

There was a bug introduced in #18676 which caused fast-path deletes
implemented as "DELETE WHERE pk IN <subquery>" to fail if the SELECT
clause contained additional stuff (for example extra() and annotate()).

Thanks to Trac alias pressureman for spotting this regression.
Added docstring to DeleteQuery.delete_qs()
Fixed #19187 -- Raise consistent error from qs.values().delete()
Fixed regression caused by #19102
Added release notes for Django 1.5 alpha 1.

Also updated 1.5-proper release notes a bit.
Tweaked tense of URL tag changes for clarity
Ensured get_version returns a native string.

Returning unicode triggers a bug in Python 2.7:
http://bugs.python.org/issue11638

This problem was introduced in 4a103086 (unicode_literals).
Update docs/releases/1.5.txt

Fix typo.
Fixed timezone tests when dict randomization is on

Refs #17758.
Fixed broken links + spell check in 1.5 release notes.
Merge pull request #472 from ericflo/patch-1

Fixed typo in docs/releases/1.5.txt
Fixed #19180 - Clarified policy regarding older versions of the docs.
Fixed #15040 - Boolean fields return 0 and 1 when loaded through select_related

Thanks to homm for the report and ramiro for the patch.
Fixed #19039 - Python 3.3 fails unit test for duplicate bad cookies

Thanks to clelland for the report.
PEP 302 source loaders already decode appropriately
Don't use : as an invalid cookie character

Since http://bugs.python.org/issue2193 has been resolved in favour of
the colon in cookie names, we need to test invalid cookie removal using
a different character. "@" is still considered invalid by all sources.