Add upload max size to Sys_settings
Add the replication feature to Cms_Piece
Merge branch 'cms_piece' of git://github.com/mmukai/zomeki-development into mmukai-cms_piece

Conflicts:
	app/models/sys/setting.rb
Merge branch 'mmukai-cms_piece'
Merge branch 'master' of git://github.com/zomeki/zomeki-development
Remove the summary and subtitle tag of GpCategory piece