Feature/sections sm1

1) Backend changes for sorting the list of users in the section(TLT 311 backend) . Sorting by 'sortable_name' field provided by Canvas. UI integration to be done after Roderick's design
2) Changes to pass in section name to section details screen so that section name is displayed(TLT 297)
3) UI integration for section details screen
4) A few test cases to check for section name attribute 
I think you'd get the same effect on the template without the if condition.  In the case where no section_name is present, a None value would be passed along to the template and it should handle that in the same way as having no key/value pair.