Overlay cleanup
[FOLD] rename members
Cleanup: Merge PeerFinder API headers into one
Cleanup: Put handout classes and functions together
Tidy up Checker declaration
Don't use callbacks to activate PeerFinder slots
Remove needless functions and inline them

Conflicts:
	src/ripple/overlay/impl/PeerImp.h
Add redirect()
Add send_endpoints
Add overlay timer for autoconnect
Move autoconnect to overlay
Move timer to overlay
Remove unused connect callback
Add sendpeers function to replace send callback
Change connected to return a bool
Remove disconnect callback
Remove Callback
Remove SiteFiles injection from PeerFinder
Move CheckerImp to header
Don't dispatch calls to Logic