Merge pull request #1229 from voltan/develop

Improve comment , user modules and theme
Fix for commont API abstract class call
Added support for user avatar attributes in comment list renderer
Cleaning up for comment feeds
Cleaning up for system feeds
Added template for user profile top-bar called from outside of user module
Fixes typo for `blacklist`
Fixes typo for `blacklist`
Fixes typos
Fixes #1232: added support for spaces in user name
Refactored validators for i18n
Fixes #1234: formulated template inclusion to support for custom templates
Added support for templates in Form view helper
Replacec form renderers with Form view helper