Changed name of custom requirements to supplemental requirements
Changed name of custom requirements to supplemental requirements
Fixed up the admin login screen to work
Fixed name of SupplementalRequirement to SupplementalMaterial
Added page for not having any supplemental materials
Moved sample files for supplemental materials
Database updates for supplemental materials
Renamed supplemental material adding page
Routes for adding a supplemental material
Added link for adding a supplemental material
Added user's name to the navigation bar
Added page for adding supplemental  materials, minus file uploads
Added comment about Slim dependency
Added the ability to edit and delete central supplemental materials
Reversed order of supplemental materials and people in navigation (trying to keep the more used one closest to the center)
Moved JS into admin.js
Fixed a bug with logging in as a new central admin
Merge pull request #260 from codeforamerica/admin-central-admin-supp-mat

"All [They've All] Got to Do" or Supplemental materials can be added, edited, and deleted