cache_schema_misses: updated specs and formatting
cache_schema_misses: cache not_found errors for schemas

This is especially helpful during callflow validation in crossbar, since
most callflow elements don't yet have schemas
KAZOO-2956: cache not_found failures of account config docs
KAZOO-2956: filter out non-couchbeam options
KAZOO-2956: cache not_found failures when looking up media docs
KAZOO-2956: initialize json object properly
KAZOO-2956: update specs and formatting
master: document accessing webhook attempt logs
Merge pull request #527 from 2600hz/cache_schema_misses

Cache schema misses
Merge pull request #530 from 2600hz/KAZOO-2956

Kazoo 2956
KAZOO-2916: Fix call recording storing media issues
KAZOO-2916: Revert a change
KAZOO-2916: Fix for pull request