Merge pull request #9938 from toobaz/safehdf5store

DOC: Link to recipe for SafeHDF5Store

Author: shoyer

doc/source/cookbook.rst

@@ -1006,6 +1006,9 @@ The :ref:`HDFStores <io.hdf5>` docs
 `Merging on-disk tables with millions of rows
 <http://stackoverflow.com/questions/14614512/merging-two-tables-with-millions-of-rows-in-python/14617925#14617925>`__
 
+`Avoiding inconsistencies when writing to a store from multiple processes/threads
+<http://stackoverflow.com/a/29014295/2858145>`__
+
 De-duplicating a large store by chunks, essentially a recursive reduction operation. Shows a function for taking in data from
 csv file and creating a store by chunks, with date parsing as well.
 `See here