[IM] Don't throw ugly errors on dev system if these are not set for the customer
[IM] IRRDB not required for non-peering members

- now only enforced for full / pro-bono customers
- requires small UI hack in that when editing associates, full form is displayed and then slides up; this is because Chosen does not render correctly otherwise. Fix needed.
[IM] Frontend glue between overview and add / edit / delete contacts
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