Better URL block for whispers

Refactor help command to stop using the -and-then resource hack

Sort discoVars

Needed at least for caps hash

Empty is "available" and should go near the top

Store presence and caps/disco info in redis

Seperate out mapping for SIP URIs so SMS targets don't get caught

Allow calls from blocked caller id

Hardcode sip.cheogram.com for now

Should this be configurable per-user or just per-instance?

Switch to dhall config and add jingle FT stuff

Update to work on latest Debian stable

Support short codes

Closes #51

Experimental start to the tel discovery/verification

Pass proxied stanzas from 1:1 route back through

Proxy through the registration form and record the route