Move these constants from iCalendar into the Database class.
It's better if we can make $this->master usable everywhere.

Using it through a getter can mean that it is not pass by reference.
Use $this->master, ensure we are dealing with a vComponent, correct split on EOL.
Deprecate the various SQL date format strings which are moved to AwlDatabase
Correct encoding of text to go in XML.
remove rendered
fix GetPropertiesByPath -> using GetComponents and GetProperties
Merge branch 'develop' of github.com:andrews-web-libraries/awl into develop