Add support for batched metadata reads and writes in Astyanax
Support batched meta reads and writes in MetadataCache
Newline fixes
More newline fixes
Separate out batched reads and writes for independently testing them
Fix race condition that might sneak in smaller batch reads/writes
For batched writes, write meta only when value changed
Support batched reads and writes for metadata cache
Merge pull request #299 from lakshmi-kannan/rax-stage

Rax stage