Denis Popov akadan47

## box-shadow.html
<!DOCTYPE html>
<html>
	<head>
		<title>Box Shadow</title>

		<style>
			.box {
				height: 150px;
				width: 300px;
				margin: 20px;

## polymorphic.py
'''Manager-based polymorphic model inheritance.

This module provides a non-intrusive approach for accessing polymorphically
instances of a model hierarchy. Non-intrusive means:
  - It does not require extending a custom ``Model`` base class or metaclass.
  - It does not require a ``ForeignKey`` to ``ContentType`` or the ``contenttypes``
    app in general. Instead the real class of an instance is determined based on
    the value (**polymorphic identity**) of a user-specified discriminating field
    (**polymorphic on**).
  - It does not override the default (or any other) model ``Manager`` (unless
	<!DOCTYPE html>
	<html>
	<head>
	<title>Box Shadow</title>

	<style>
	.box {
	height: 150px;
	width: 300px;
	margin: 20px;
	'''Manager-based polymorphic model inheritance.

	This module provides a non-intrusive approach for accessing polymorphically
	instances of a model hierarchy. Non-intrusive means:
	- It does not require extending a custom ``Model`` base class or metaclass.
	- It does not require a ``ForeignKey`` to ``ContentType`` or the ``contenttypes``
	app in general. Instead the real class of an instance is determined based on
	the value (polymorphic identity) of a user-specified discriminating field
	(polymorphic on).
	- It does not override the default (or any other) model ``Manager`` (unless