Fix new RPC dispatcher params
Fix clang compile error
Update Travis matrix:
* New clang compiler target
* Sconstruct changes for clang
* Patches to support clang
Use chrono in DeadlineTimer
Refactor PeerFinder:
* Revise documentation in README.md
* Inject abstract_clock in Manager
* Introduce the Slot object as a replacement for Peer
* New bullet-proof method for slot accounting
* Replace Peer with Slot for tracking connections
* Handle errors retrieving endpoints from asio sockets
* Prevent duplicate outbound connection attempts
[WIP] Use Slot in Peers
[FOLD WIP] Complete the migration of tracking from IPAddress to Slot