Installer fixes:
+ Added DOCTYPE to pages
+ Increased server timeout to 15mins on zip file download and uncompress
Update how workflow action attribute values are loaded
Merge branch 'develop'
Update how workflow action attribute values are loaded
Merge branch 'origin/feature-ds-attendedcheckin'

Conflicts:
	Rock/Workflow/Action/CheckIn/LoadGroups.cs
	Rock/Workflow/Action/CheckIn/LoadLocations.cs
	Rock/Workflow/Action/CheckIn/LoadSchedules.cs
Merge branch 'origin/develop'

Conflicts:
	Rock/Workflow/Action/CheckIn/LoadGroups.cs
	Rock/Workflow/ActionComponent.cs
Update to use GetAttributeValue correctly