Add maybe_const
Fix basic_seconds_clock warning and project file
Remove deprecated IPAddress
Fix auto keyword pass by reference
Add aged associative container based classes:
* aged_set
* aged_map
* aged_multiset
* aged_multimap
PeerFinder fixes:
* Fix split horizon using recent address cache
* Change message tuning parameters to reduce dead messages
* Improved peer handout algorithm for addresses
* Improved handout algorithm for redirects
* Faster autoconnection strategy
* Consolidate deadline timers
* Send empty endpoints message as a socket ping
* Fix hop count adjustments for live cache filtering
* Remove broken Peer::isConnected function
* Optimized Livecache for handouts