Tests for MEssages with ContentType HTML
Merge branch 'dev' of https://github.com/OfficeDev/Office-365-SDK-for-iOS into dev
Merge branch 'dev' of https://github.com/OfficeDev/Office-365-SDK-for-iOS into dev
Merge branch 'dev' of https://github.com/OfficeDev/Office-365-SDK-for-iOS into dev