maarten/aardbei: Sprankelprachtig aan/afmeldsysteem

Sprankelprachtig aan/afmeldsysteem

Maarten van den Berg 4906a31437 Hide subgroup selector if no subgroups present		7 lat temu
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assets	833da72b94 Retab, update on change	7 lat temu
channels	f22d20f542 Initial commit: rails new, first models	8 lat temu
controllers	f9e22be538 Add Subgroup-reference to participant	7 lat temu
helpers	129abe9942 Better fix	7 lat temu
jobs	f22d20f542 Initial commit: rails new, first models	8 lat temu
mailers	60a0b7dfd3 Add ParticipantMailer	7 lat temu
models	e0d094833a Add random subgrouping	7 lat temu
views	4906a31437 Hide subgroup selector if no subgroups present	7 lat temu