* Fixed object assignment operator for agency's key value store
* Node's toJson is now actually toJson. getString should be used for string extractions
* adjust agency's documentation (clarify precondition)
* added debugging methods
* try to fix invalid access in case of error
* remove unused members
* bugfixes and comments
* all agency fixes in
* merge bug
* partially unguarded Agent::lead fixed
* all agency fixes in
* added nrBlocked to thread startup eval
* added nrBlocked to thread startup eval
* recombination of cases in State::get
* some maps replaced with unordered_maps
* optimized maps some
* fix buffer overruns in linenoise for long input lines
* don't make historian repeatedly print the same error messages that nothing can be done about
* make the implementations of the logging operator<<s not throw exceptions, so that logging does throw exceptions as an unintended side effect
* update CHANGELOG
* improve error message
* don't copy strings, but pass them by const reference