Mention register_error_handler in errorhandler doc

The documentation for @errorhandler gives "app.error_handler_spec[None][404] = page_not_found" as an example for adding an error handler without the decorator.  However, register_error_handler appears to be the correct way to do this (added 0.7), and it eliminates the problems with modifying error_handler_spec directly.
Update blueprints.rst - Error Handlers

Added information about custom error handlers in Blueprints with example based simple_page.
Update sessions.py

get_cookie_path: fix docstring
Add a non-decorator version of the error handler register function

The main application object has a register_error_handler function
which mirrors the decorator's functionality. According to the principle
of least surprise, make sure blueprints also have this convenience function.
Add tests for user-defined exceptions in blueprints
Fix test_no_error_swallowing

Path in assertion is now cross-platform.
Fix test_send_file_object

static/index.html now opens in binary mode, and therefore newline conversion does not take place.
Make the decorators attribute on View a tuple by default

To discourage accidental runtime modification applying to all views.
Merge branch 'master' of github.com:obeattie/flask
added missing import in sqlalchemy doc
Fix typo
fix typo (jsonfiy)
add TEMPLATES_AUTO_RELOAD option to config
Fix a typo on blueprints module name.
Update url_for documentation

Previous documentation referenced a non-existent property on the Flask
object called "build_error_handler".

This should actually reference Flask.url_build_error_handlers.
Escaped 'text' keyword in column name.
moved Table import to next code block
Update windows installation and other notes

Making allowance for new convenience of `get-pip.py` that automatically installs setuptools and pip together.

Stop recommending distribute, which has now been merged into setuptools.
Merge pull request #877 from yoloseem/patch-1

Fix a typo on blueprints module name.
Merge pull request #874 from defuz/patch-1

fix typo (jsonfiy -> jsonify)