Merge pull request #65 from chadbrading/master

Changes format on items page
supplier model has users
able to create suppliers
Merge pull request #67 from allisonlarson/supplier_model

Supplier model
begin supplier overhaul
fixed shit; suppliers have items
Upgrading to Rails 4.1.5 to fix Brakeman vulnerability
Merge branch 'master' of https://github.com/tyrbo/the_pivot
Merge pull request #68 from allisonlarson/supplier_model

Supplier model
starts reformatting suppliers page
fixes merge conflicts
updates seed data for suppliers
updates category sidebar links
updates suppliers page