Update voip notifications guide removing heading
Update callkit guide removing heading
Update installation guide
Update requirements guide
Fix iOS 9.0 disclaimer
Fix code spacing
Update CallKit guide, adding disclaimer for framework non available on iOS 10.0
Ad Call Banner
Fix a typo and delete an extension
Add Swift snippet for Message notification controller
Fix some typo
Add Channel view controller and Message notification Controller
Update code spacings
Update typos and comment spacing
Start to write chat section
Update voip notifications guide, fixing toc not rendered properly
Update CallKit guide removing stale chapter
Update voip notifications guide
Update 1.2.0 migration guide, adding CallWindow chapter
Update VoIP guide
Fix footer issue link
Update CallKit doc adding video button chapter
Add Footer
Update device permissions
Update CallKit.md
Add Migration guide
Create VOIP notifications page
Fix permissions page
Create permissions page