store: remove active support notifications for write/delete
test: add byebug
test: refactor to assert_notifications with num arg
test: add tests for readonly cas and cas multi
snappy_store: always return false for read_only
gems: remove byebug
test: simplify
store: handle refreshed entires on read only
test: add explicit for read_multi and read when read only
store: return true when read only in {delete,write}_entry
test: refactor notifications helper
Merge pull request #24 from Shopify/read-only-better

read only: don't send active support notifications