Make predicate mismatches not hide other possible valid views.

This is mostly an issue for REST style views that use request_method
predicates and are registered for context interfaces.

See Issue #409
Change log note.
Add some tests for how content types and HTTP "Accept" header handling
behave.
Merge branch 'master' of github.com:Pylons/pyramid
add failing test for callable acl
support acl as a callable
reorder some imports to be alphabetical
Merge branch 'feature.callable-acl'
Merge branch 'master' of latteier/pyramid into pull.786
Merge branch 'master' of github.com:Pylons/pyramid
Merge branch 'pull.786'
add test to ensure unrelated views are not invoked after PredicateMismatch
Merge pull request #920 from msabramo/accept-tests

Add some tests for how content types and HTTP "Accept" header handling behave.
Fixes #798: Allow a protocol-relative URL to be passed to add_static_view, generate URLs using the current protocol.
Merge branch 'master' of github.com:Pylons/pyramid
remove files with higher order characters from the repo and fix tests

the 2 tests that use these files now generate them on the fly, this
should work on non-linux systems
Merge branch 'fix.highorderchars-in-tests'
More explanation around pcreate

Not sure how much to explain there but it needed some more explanation. Perhaps we could link to a doc about pcreate?
fixed the syntax for exporting the VENV
Merge pull request #923 from thesteve0/master

Update to the wiki2 tutorial installation steps