Update README.md

Typo fix
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.
Merge origin/master

Conflicts:
	backend/config/main.php