introduced interface for notifying ds service to update experiment users; fix bug in linux experiment utility

add first functional DS web service with user, experiment and auth controllers that allow retrieving user and experiment information from the db, start/stop experiment, and principal authorization; added corresponding API and CLI classes; added storage manager skeleton

add first functional daq web service with experiment controller, functionality to observe file system and invoke file transfers; add initial API and CLI classes for start/stop daq, upload data;