This implements the bare minimum necessary to store a 33 byte public
key and use it in ordered containers. It is an efficient and well
defined alternative to RippleAddress when the caller only needs
a node public key.
Profiling indicated some performance issues coming from the
cache of 160-bit account IDs to base58 format. This replaces
the single cache with two caches and rotates out old
entries.
* 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
* New src/ripple/crypto and src/ripple/protocol directories
* Merged src/ripple/common into src/ripple/basics
* Move resource/api files up a level
* Add headers for "include what you use"
* Normalized include guards
* Renamed to JsonFields.h
* Remove obsolete files
* Remove net.h unity header
* Remove resource.h unity header
* Removed some deprecated unity includes
