Merge pull request #1 from SparkartGroupInc/dr3JdTPS-migration-template

Layout template and preprocessor
Media widget
Merge pull request #3 from SparkartGroupInc/media-widget

Media widget
change partial to placeholder

the actual template for the subscribe widget is rendered on the front end
change widget tag class
Include title option in partial

Include title option in partial to match CT behavior. Add form tag inside to be replaced instead of replacing entire widget div.
fix title tag
add site.yml values to variable bridge

add all values to bridge instead of only selected values
add default alerter partial
add front end widgets from template

move front end widgets from template to here
minor changes to alerter config