db __repr__ raise AttributeError when using db = SQLAlchemy() for self.app is None

Signed-off-by: Armin Ronacher <armin.ronacher@active-4.com>
Added changelog entry
Magic table!
master is 0.11-dev
Fixed a bug with Table() constructors
HEAD is 0.12-dev
Submodules restore
Added a docstring for apply_driver_hacks
Set default relation query_class to BaseQuery.

Set default query_class for `db.relation`, `db.relationship`, and
  `db.dynamic_loader` to Flask-SQLAlchemy's BaseQuery.
Expose BaseQuery as db.Query (fixes ticket #13).
Basic support for multi db
Missing dot
Removed the signalling mapper subclass in favor of a factory. This fixes #29
Expand documentation on query classes and Table.
Moved a helper into a method so it can be overwriten.
Added makefile
Merge remote branch 'rduplain/master'
Adapt Flask's sphinx conf.py for this project.
Split docs into multiple pages for sphinx.
Lift LaTex style & logo PDF from Flask docs.

These might be better placed in a repository submodule.