Untiered docker images for easy Jenkins setup

[prigoyal]

moving the docker images to base off of nvidia docker images and make them non-tiered

closes #79

[nicolasvasilache]

+1000 for dropping docker/common/install_cuda.sh and using the NVIDIA provided image.

[nicolasvasilache]

So I am still having issues understanding why we need to explicitly install the compiler that IIRC comes by default with the particular distribution (gcc-4.8 for trusty and gcc-5 for xenial).

My current understanding is that there were libstdc++ version / linking issues when mixing this with conda. Is that accurate?

I think it's ok to punt on the investigation if it requires non-trivial extra work.
But if you have more details already, I'd still like to understand what the problem is.

[prigoyal]

So I am still having issues understanding why we need to explicitly install the compiler that IIRC comes by default with the particular distribution (gcc-4.8 for trusty and gcc-5 for xenial).

this is a safety measure, if someone wants to play with the trusty image but use gcc5.4 let's say then they will know that the image corresponds to what gcc version explicitly and things won't silently fail. Conda also ships its own gcc and libstdc++ and given the light of this, I find it better to be explicit. it affects protobuf as well.

nothing more to investigate on this :)

[nicolasvasilache]

got it, explicit trumps implicit, thanks!

[nicolasvasilache]

Looks good!

[prigoyal]

thanks @zdevito :)