Grammatical fixes in Foreword and Tutorial
docs: :file:`app.py`, :file:`yourapp/templates`
docs: http method names like ``GET`` and ``POST``
docs: ``True``, ``False`` and ``None``
Rewrote tutorial to use the g based appcontext object
Less annoying gender neutral forms
fixed pronoun gender in documentation
Warn about SQL injection in the tutorial.
Minor tutorial documentation fixes (grammar, etc)
Ported examples over to new config. documented upgrading
Added lazyloading pattern and explicit chapter links in tutorial.
This fixes #49.
New style for the documentation. Looks more like the website now.