BLD: add support for pytables 3.1
BLD: update 3.3 build for numexpr 2.3

closes #5861

@y-p when you have a chance

I am not sure how to update whl for numexpr 2.3 and pytables 3.1
(or do you have whl for them?)

pls update your windows configs as well.thanks
 Jeff you can 
 Ping me whenever you need some wheels for Travis 
 @cpcloud if you could make a whl of pytables 3.1 and numexpr 2.3 would be gr8! 
 Also if you want I can put your pub ssh key on the open shift server in case I get trampled in a wildebeest stampede
 thanks...just e-mailed to you
 Cool thanks I'm on my way to work. I can set you up when I get in. 
 I've updated the windows CI 3.4.0 build with numexpr 2.3 and pytables 3.1 final,
but the laptop has to go back to it's owner (back from abroad) in a few weeks...
no more windows CI.
 hmm ok

i could run the windows ci

can u send me how to setup?
 Sure.
 Just checking: I don't have any issues currently with pytables 3.1 and pandas 0.13.1 (or numexpr 2.3) on ubuntu 64bit -> is that correct or am i at risk and should I downgrade any library? (couldn't really find anything about this in the normal docs)
 oh it works
it just isn't in the test suite yet (their were a few small issues but are resolved)

just note that the file caching works slightly differently in older hdf versions (you will get an error message if it's too old)
i
 Thanks!
