Add peer count to HTTP server properties
Normalize sort paths in Visual Studio project generator
Refactor string-to-integer conversions
Cleanups:
* Remove obsolete config variables
* Reduce coupling
* Use C++11 ownership containers
* Use auto when it makes sense
* Detect edge-case in unit tests
* Reduce the number of LedgerEntrySet public members
Add ledger cleaner documentation (RIPD-555)