Merge pull request #937 from intportg/dev

Addresses handling in fornt office + minor fixes
New methods snakeCase and camelCase in \Rbs\Stdlib\String
Fix rendering of warning messages in console.
Some updates in dev commands:
 - add rbs_dev:initialize-block command to add classes for a block
 - add rbs_dev:devrest command to (de)activate devrest.php
 - rename rbs_dev:create-command to rbs_dev:initialize-command (homogenization with other commands)
 - some fixes in rbs_dev:initialize-command (mainly to deal with the new path of project's modules)
 - some refactoring to match with the default organization of commands (move command listeners and assets from Events directory to the Command one)
Code formatting.