Construct Server after Overlay and WSDoors:
When the ServerHandler is constructed before the Overlay, an incoming
connection received after the server's listening ports have been opened
but before the Overlay object has been created causes a crash.
Tidy up split_commas function and use it in Server

Conflicts:
	src/ripple/server/impl/ServerHandlerImp.cpp
Accept generic arguments in ci_equal
Clean up CKey and RippleAddress (RIPD-672)

* Remove CKey dependency on RippleAddress
* Create RAII ec_key wrapper that hides EC_KEY and other OpenSSL details
* Move CKey member logic into free functions
* Delete CKey class
* Rename units that are no longer CKey-related
* Delete code that was unused
Update integration tests for changes to ripple-lib account request API:

Account requests expect an object as first argument
Changed doc/rippled-example.cfg to specify default for ssl_verify