Remove dead code and fix a race condition in the node back end.
Race was between a store and a fetch, as follows:
1) Fetch: Search for the node, it is not found.
2) Store: Add the node to the database, remove the node from the negative cache.
3) Fetch: Add the node to the negative cache.
This would leave a node in the DB, cache, and negative cache.
Change visitLeaves to visit a snapshot so the ledger stays unlocked
Fix for issue 211, fixes to NetworkOPs getTxsAccountB
The new recommended fee schedule is:
* Transaction fee: 10 drops
* Base reserve: 20 XRP
* Incremental reserve: 5 XRP
Move DecayingSample to algorithm
Fix load stats in get_info
Make AbstractObject unit test manual
Memory-conserving changes to SHAMapTreeNode and visitLeavesInternal.
Pathfinding performance improvements:
* Use a single RippleLineCache, even for 'fast' requests
* Use a ledger copy to avoid stalling other code
Suppress a warning.
Move some ledger cleaner helper functions into the ledger master.
Add a 1 MB payload limit to incoming websocket requests
Avoid an extraneous test.