* Revert "Move blocks to stable flag (https://github.com/woocommerce/woocommerce-blocks/pull/2261)"
This reverts commit a005649ab8.
* migrate to number based gating
* add todo to watch feature flag
* remove flags from build
* change flag in travis
* load flag in right order
* expose flag to js
* simplify flag definition
* more feature flags
* wrap flag in check
* add helper functions
* add helpers in PHP
* fix typo in flag
* move php code to src/domain/package
* tweak if condition
* return flag to travis
* fix broken block name