ENH: more verbosity to PyTables import failures
what kind of messages show up here? (ehat does a sample exception look like)
 this doesn't build properly. pls update and lmk.
 @jreback -- thanks for looking at this. Previously you get the exception "HDFStore requires PyTables" when there is a problem with loading the underlying HDF5 shared objects / libraries referenced by (py)tables. I had to spend a bit of extra time tracking down the error, where now the exception will say something more specific like "HDFStore requires PyTables, "could not find libhdf5.so.6" problem importing". Just a tweak for diagnosing.
 ok, looks fine. pls squash to a single commit. ping when green.
 @jreback -- ping.
 thanks!
