Merge pull request #33 from eCrowdMedia/hotfix/1.7.1

Hotfix/1.7.1
Merge branch 'hotfix/1.7.1'
Merge branch 'master' of github.com:eCrowdMedia/OAuthAPI
Merge branch 'develop' of github.com:eCrowdMedia/OAuthAPI into develop
Add ping method in readings api module
Merge pull request #34 from eCrowdMedia/feature/new-reading-api

Add ping method in readings api module