DataColumn doesn't have "name" & "type" fields, and should have fully qualified name if not omitted

fixed some urls in guide; moved elasticsearch png file to proper location, to be seen by apidoc generator

small typo

Corrected 'class' parameter

Really not sure what this is. It seems incomplete as is.

This reverts commit 2bb6f135.

Fixing #2556: finished theming docs, emphasized on the fact that themes are non-redistributable and application-specific

fix doc code according to yii2 core code style (When instantiating class it should be new MyClass(); instead of new MyClass;.)

print_r($data) should be print_r($user->attributes)