RC1 final touches

[cliffckerr]

• [x] Update deaths calculation
• [x] Use hybrid population type
• [x] Disable location selector
• [x] Add more impassioned disclaimer
• [x] Remove population scale factor
• [x] Remove number of contacts
• [x] Add other severity parameters
• [x] Add a second example
• [x] Add tool tip for data upload
• [x] Add tool tips for interventions