eliminate channel names and descriptions

context

• channel names and descriptions are helpful, but they leave potentially compromising metadata in persistent cleartext on both signalboost's servers and the devices of our users
• so: let's eliminate them and instead (1) suggest that subscribers name the channel in their contacts in the welcome messages, (2) suggest that channel admins provide the context provided by the description through template messages that they copy/paste and send out regularly to the channel
• first: let's do some extensive-ish user interviews to gauge the pain that will be caused by this rather draconian UX change!

behavior

GIVEN an admin who has just created a channel

• THEN an admin will receive a welcome message that suggests they (1) store the number as a contact in their phone, (2) create a "description" message that they send out semi-regularly to the channel to orient people

GIVEN a subscriber who has just joined a channel

• THEN the subscriber will receive a welcome message that suggests they store the channel number as a contact in their phone

GIVEN a message is broadcast on a chanel

• THEN there will not be a channel name in the header

GIVEN anyone sends INFO to a channel

• THEN they will not see either a channel name or description in the response

user-facing communications

• check-in w/ >= 4 users on how they feel about this change
• explanatory note to BOOST IT before we ship this
• explanation on splash site as to why we do this (?)