Fix move constructor of aged_unordered_container (RIPD-490)
Fix exception safety in aged containers
Use aged containers in Validators module (RIPD-349)
Tidy up sources
Add validators aged container test
src/README.md:  s/addded/added/
Clean up some docs
* Consistent line endings in rippled-example.cfg
* Rewrite CodingStyle.md. Get down to top priorities
Fix warnings and compile errors