Merge branch 'release/v2.1.0' into develop

* release/v2.1.0:
  Bump version to v2.1.0.
Merge branch 'hotfix/v2.1.1' into develop

* hotfix/v2.1.1:
  Fix refresh bug.
Add questionnaire.html page.
Add name attributes where id attribute exist.
Change index.html page.
Bump version to 2.2.0.
Merge branch 'release/v2.2.0'

* release/v2.2.0:
  Add questionnaire.html page.
  Add name attributes where id attribute exist.
  Change index.html page.
  Bump version to 2.2.0.