Allow loading template from iterable
Add updates to render_template to CHANGES, #409.
Update docs/errorhandling.rst
Update docs/patterns/wtforms.rst
Remove redundant words from quickstart.
Blueprint example app
Blueprint example tests
Fixed silent keyword arg to config.from_envvar.

The ``silent`` keyword argument to Config.from_envvar was not being honored
if the environment variable existed but the file that it mentioned did not.
The fix was simple - pass the keyword argument on to the underlying call to
``from_pyfile``.  I also noticed that the return value from ``from_pyfile``
was not being passed back so I fixed that as well.
Cleaned up test case for issue #414.
Fixed assumption made on session implementations.

In the snippet 'session.setdefault(...).append(...)', it was being
assumed that changes made to mutable structures in the session are
are always in sync with the session object, which is not true for
session implementations that use a external storage for keeping their
keys/values.
Split ebook build process into own make target.
On JSON requests, the JSON response should have Content-Type: application/json and the body of the response should be a JSON object.
add heroku/deploy options to quickstart, and add more clear links in tutorial setup.
update links
Fix issue 140

This allows for a view function to return something like:

    jsonify(error="error msg"), 400
remove localtunnel things that were added to snippets
Added _PackageBoundObject.get_static_file_options.

This method receives the name of a static file that is going to be served
up and generates a dict of options to use when serving the file.  The
default set is empty so code will fall back to the existing behavior if
the method is not overridden.

I needed this method to adjust the cache control headers for .js files that
one of my applications was statically serving.  The default expiration is
buried in an argument to send_file and is set to 12 hours.  There was no
good way to adjust this value previously.
Fix grammar in extension dev docs.
Specifying supported Python versions in setup.py metadata
Add jsonp support inside of jsonify