Development workflow updates on Gruntfile

Enable Livereload on payload files.
Don't load minified payload on development.
Factor out session extraction code to session_engines
Add timeout for XDomain session extraction
Refactor Session
fixup! Factor out session extraction code to session_engines
fixup! Factor out session extraction code to session_engines
REFACTORED ACTION MANAGER

IT NOW SUPPORTS AFTER LOAD DIRECTIVES.
IT ALWAYS SENDS A BEACON PER ACTION.

PAGEVIEWS NOT IMPLEMENTED
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