Cleanup:
* Remove is_bit_set and use regular bitwise operations instead.
* Remove the function-like macro "nothing".
Ledger load and ledger replay fixes:
 * Stash the loaded ledger where consensus can find it.
 * When loading a ledger for startup, try the backend too
 * Apply replay transactions to a mutable snapshot
Fix state check in PeerImp::recvHello
Process switches with regex in VSProject generator:
* Handles "DisableSpecificWarnings" switches
Tidy up rpc module:
* Move directory up to ripple/module/rpc
* Use C++11 idioms and best practices
Better types and more comments in RippleCalc.

* Better automatic conversions to and from tagged uint160 varints.
* Start using tagged variants of uint160 for Currency, Account.
* Comments from 2014/6/11 RippleCalc session.
Merge branch 'develop' of github.com:ripple/rippled into develop