- Adds logo for Purdue RCAC
- Adds functionality to provide card background for image
- Updates the org-members.yaml file with Purdue RCAC

- Moves the code for looping through an org tier to new include
- Updates the org-members.yaml file to have arrays for each tier
- Adds functionality to add a background color to the org cards
- Adds some logic to verify we have each tier before trying to render cards

- Updates the org-members.yaml to fix Purdue's tier and date joined

- Updates the Purdue image to use their more square one
- Changes background color to a grey