Deprecate context_hash since it's a duplicate of to_hash but originally intended for testing
Merge branch 'deprecate-context_hash' of https://github.com/padi/light-service

* 'deprecate-context_hash' of https://github.com/padi/light-service:
  Deprecate context_hash since it's a duplicate of to_hash but originally intended for testing
Update README.md

Fix error on Readme
Merge branch 'patch-1' of https://github.com/smartinez87/light-service

* 'patch-1' of https://github.com/smartinez87/light-service:
  Update README.md