[ADD] started non time critical task system, not yet implemented by
HttpServiceAssister (the assister is aware of the system but does not
make use of it yet)
[ADD] HttpServiceAssister now makes use of the non time critical
webrequest system
[FIX] configuration check fix
[CHG] dedicated method for non critical webrequests added
[FIX] more minor fixes
[ADD] listener infrastructure for tasks
[ADD] example code for working with non time critical web requests
[CHG] logical changes
[CHG] updated example code
[ADD] comment