Regenerate gemspec for version 0.8.4
Regenerate gemspec for version 0.8.4

reenhanced/datagrid,artofhuman/datagrid,reenhanced/datagrid,sadaf2605/datagrid,artofhuman/datagrid,bogdan/datagrid,sadaf2605/datagrid,bogdan/datagrid,jeanlinux/datagrid,jeanlinux/datagrid