Redone structure drawing
Fixed drawing misalignment
Added more arrows
Used new drawings in the guide, removed old ones
Improve `exist` validator to support array attributes
Refactoring
Refactoring
Finished the "Saying Hello" section [skip ci]
minor edits [skip ci]
Used static structure diagram for application structure
guide WIP [skip ci]
guide WIP [skip ci]
guide WIP [skip ci]
Merge pull request #3412 from technixp/master

Fixes #3368 value also has to be parsed.
Estonian translation
Merge pull request #3417 from stevekr/master

Estonian translation
VKontakte OAuth support added
Update config.php
BaseVarDumper::export() added
Doc comments for `BaseVarDumper::export()` added