Created system paths file
Renamed Filter to EnrollmentFilter
Moved EnrollmentList from the Session/Filter to Session directory.
Renamed Type to Restriction.
Added Session use.
Added email templates
changed namespace and added NotifierInterface usage.
Renamed DailyNotifierService to DailySessionNotifier
Moved the SessionFilterService to CESS/Experiment/Session
Created the TemplateEngineInterface
renamed function getOpenSessionBetween to getSessionBetween.
changed exception catch type to from PDOException to Exception, and removed the repository instantiation.
Added generation of the Template engine, mailer, and logger to the container.
changed the isSessionFilterSatisfied function signature to satisfy refactoring changes.
refactored getOpenSessionBetween to getSessionBetween to satisfy the change to the RepositoryInterface.