lp1635386 Items Column & Styles for Bill Item Status

lp1635386 Items Column & Styles for Bill Item Status

- CSS classes for red, dark red, and orange eg-grid-cells.
- New parameter for eg-grid 'rowClass' to take an object with a function
to set the class of a cell, allowing such customizations as coloring based
on item fields.
- Implementation of 'rowClass' on the Patron Bills interface to display
colors indicating current Fines Stop reason, based on XUL client.
- New parameter for eg-grid 'statusCell' to take an object with a function
to programattically add status icons to a new "Status Icon" column. Said
column requires a boolean in the object in order to display.
- Implementation of 'statusCell' on the Patron Bills interface to display
glyphicons based on if the bill is for a circ that is lost, overdue, or long
overdue.

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
 Changes to be committed:
	modified:   Open-ILS/src/templates/staff/circ/patron/t_bills_list.tt2
	modified:   Open-ILS/src/templates/staff/css/style.css.tt2
	modified:   Open-ILS/src/templates/staff/share/t_autogrid.tt2
	modified:   Open-ILS/web/js/ui/default/staff/circ/patron/bills.js
	modified:   Open-ILS/web/js/ui/default/staff/services/grid.js