Convert file and folder names for 2.0. This is the beginning.
Merge branch 'master' into 2.0

Conflicts:
	Model/EntityModel.php
Success to run testcase. Test cases are not success. Just run.

FAILURES!
Tests: 10, Assertions: 67, Errors: 3.
Yes! All green!

PHPUnit 3.5.15 by Sebastian Bergmann.

..........

Time: 1 second, Memory: 15.50Mb

OK (10 tests, 86 assertions)
formatting
Simplified code for Entity->save()
Added Entity->update() method
Added Entity->delete() method
Allow entities to inherit other entity modelClass variables
Convert entities when there is no primaryKey set in the data
Fixed method declaration incompatibility in PHP 5.4
Allow conversion of entities within EntityModel subclasses
Updated Entity->save() to allow setting $validate
Added entity->validates() and entity->invalidate()
Use Hash class where possible
Added entity->fromArray() helper method
Set primaryKey on successful entity creation
Use __call instead of call__ in CakePHP 2.0
Embedded documents support in Model schema