Merge pull request #39 from nukeviet/develop

Update code from nukeviet (30/04/2014)
Merge pull request #40 from nukeviet/develop

Update code from nukeviet (01/05/2014)
Module news: Css menu
News: fix "Unknown column 'thumbnail' in 'field list'"
Fix display sort comment
Merge pull request #274 from hongoctrien/develop

Fix display sort comment