check_survey_metadata: Check survey metadata
Description
Returns title/description HTML tags as needed.
Usage
check_survey_metadata(survey_description, survey_title)
Arguments
survey_description
The survey's description from surveyOutput
survey_title
The survey's title from surveyOutput
Value
Returns error messages if required paramters are not supplied,
otherwise it returns the appropriate code for survey titles and description
for use in surveyOutput.