generic stuff promoted to hal.device module
added missing end-points and specific root properties initialization for new instances
better reporting in log
outputs and parms revisited
polling period definition revisited
added utility function
added debug option for not waiting for cfgbroker
removed wrong unconditionnal 'required' validation rule for varname field
added small variations filtering and polling period syntax enhanced
added settings parameter to __init__ module function
fixed wrong url for daat export
added settings parameter to __init__ module function
modified log display field content update sequence
added support for a per-weblet configuration file
events ttl config parm refactored as period
added period value parsing function
suffix added for period typed value input field prompt
small cosmetic and organisation changes
fixed events ttl configuration value handling
small cosmetic changes