replacing strict ISO 8601 timestamp with space instead of T

more user friendly, more easy to display in narrow tables
console: clarify events page captions
more traces and less lock in scheduler
console: www is so 1999...
console: more concise label on raised alerts view
scheduler now has its own dedicated thread

avoiding being poluted with model updates and other main thread activity
minor scheduler fault tolerance enhancements

* scheduler reevaluates all triggers every 60 seconds to avoid scheduler
  stalls when the system time goes back
* renaming requestTask to syncRequestTask to clarify that it is not a
  more standard method than asyncRequestTask
* RequestTaskEvent now uses asyncRequestTask()
ssh execution has more parameters and more fail-safe openssh options

new parameters are: ssh.username, ssh.options, ssh.identity, ssh.port, and
ssh.ignoreknownhosts (default: true)

new failsave options set automaticaly are: BatchMode=yes
PasswordAuthentication=false ConnectionAttempts=3
KbdInteractiveAuthentication=no EscapeChar=none

in addition, LogLevel=ERROR option is now set, avoiding the need for a
stderr filter against empty known hosts file warning
fatal log traces sent on console, rather than none at all

this make debuging configuration file far easier :-)