Fixes #2911: Removed `tbl_` default for table prefix
Renamed fixtures
Added table prefix to advanced application migration
Added table prefix to advanced application migration (now drop table)
use alias format for table names
#2936: New favicon for applications
Moved all filter classes to namespace `yii\filters`
Refactored AR find
Removed `Application::preload` in favor of `Application::bootstrap`
updated error handler and requirement checker links.
Refactored app bootstrap logic.
prepare for 2.0.0-beta release.
prepare for next release.
Code style and phpdoc fixes
Fixes #3088: The debug and gii modules will manage their own URL rules now
setting writable folders in init-script

It is said, that these folders are handled already by composer.json, what is definitely true. But if I can't (or don't want to) call composer create-project command, I have to run post-create-project-cmd manually like `composer run-script post-create-project-cmd`. IMHO, it's consistent to make such preparations in init script.
no need to set writable folders for console
removed unnecessary lines regarding writable dirs
Fixes #3179: removed duplicate validation rules from User model in advanced app, removed User::create()
Advanced app `init` usage example typo fix