Event handlers

[cameron-morrow-toptal]

this branch was created from the multiple branch, please review/approve/merge that first

this branch switches the radar event handlers to use multiple generic arguments instead of a singular tuple argument, allowing for cleaner syntax when assigning new handlers to events

this is technically breaking for anyone who assigned handlers to the radar events with multiple parameters. instead of coding
Radar.LocationUpdated += args => { var (loc, user) = args; ... }
they will code instead
Radar.LocationUpdated += (loc, user) => { ... }