Make is_set_bit a universal template function
Refactor usage of boost::format
Add beast::tagged_integer:
 * Wraps standard integer types to provide type-safety
 * Named types provide self-documenting semantics
 * Catches programmer errors involving mismatched types at compile time
 * Operators restrict mutation to only safe and meaningful operations
Add CleanCCPFiles.py, a utility for tidying up whitespace
Convert all uses of boost::tuple to std::tuple
[WIP]  I've removed boost::unordered_map from all parts
of rippled except Peers.cpp.  I've run out of time to
do this now.
Continue removing use of boost::unordered_map
[WIP] Continuing to work on getting rid of boost::unordered_map