Delegated in all ctors without time to those with time as parameter.

Using the new "util::getTime()" function all classes with 2 ctors, one with time and without time as parameter, that are otherwise similar, the timeless ctors now delegate to the ctors with time parameter.
Added some notes to "ReferenceList" class.
Merge pull request #165 from balint42/delegate_ctors

Delegated in all ctors without time to those with time as parameter.