provision: move role vars to defaults (certs and tram-im roles)

updatesri: ignore egrep exit code (since we do set -e and pipefail)

updatesri: this is bash, use $() instead of ``

provision: update tasks to use more YAMLy syntax

css: bring back bottom margin for contact list

css: remove dividers between contacts

css: remove contact list margins (compensate with contact padding)

css: animate contact switching

index: expand, but also deduplicate existence checks for previous and contact

index: debug error stanzas in console