SERVER-15319 Fix stats.js for new pdfile version
Simplify _ok bit management in thet kv heap dictionary cursor, implement
temp_cappedTruncanteAfter using a forward iterator since that avoids an
issue WRT reverse iterators and deletes when using thet kv_heap engine (
no resolution on that issue yet )
SERVER-13635: pass namespace to createRecordStore for kv
Merge branch 'master' of https://github.com/mongodb/mongo into kv_dictionary
- Simplify the kv dictionary comparator, make it more abstract
- Drop the leading underscore on get/drop/createKVDictionary since they
  are not private