numeric order field for submission dataTable
should be an array
add missing comma
always send integer to the browser
align right, numbers
use numeric-comma for jquery datatables
let js get formatted numbers
Revert "let js get formatted numbers"

This reverts commit de634a6094bf0445367132ef943984efaf4263c8.
Revert "use numeric-comma for jquery datatables"

This reverts commit 3c88d6639c6e31fcefac5a8a13f33ae55771387d.
Merge pull request #957 from modilabs/942_numeric_order_field

fix sort order in formhub.org/stats/submissions closes #942