Merge pull request #4 from nukeviet/develop

Develop
change config backup database
change config system
fix search for module upload
change fomat date
optimizer css
fix admin relogin
Update module upload
optimizer file tpl
fix image not exit in file css
Add function: Hosting CDN for javascript, css
module upload: fix data setup
Module News: Using thumb images created by the upload module
fix mudim on editor when using the Chrome browser
Navigate site if url is incorrect
change size upload popup
fix class imange for php 5.4
module upload: fix refresh image
Module weblinks: Using thumb images created by the upload module
Module Download: Using thumb images created by the upload module