[SUITEDEV-2114] add .jshintrc
Merge remote-tracking branch 'origin/master'

* origin/master:
  [SUITEDEV-2114] hash and hmac functions
  [SUITEDEV-2114] calculate signature
  [SUITEDEV-2114] remove unused method
  [SUITEDEV-2114] calculate signing key
  [SUITEDEV-2114] refactor signer