Fix CudaNdarray repr in python 3 and a crash.

Sample multinomial with replacement

fix gh-4036. We need the shape and we don't compute it. It wasn't timmed, so don't try this optimization.

Cleaunup profileMode deprecation in docs

(#4024) cutting the *.a extension in ldlibrary file

Cudnn version, print it, warn when too new, make mandatory in the new back-end.

Fix segfault for very big size. I did some timing and there is no di…

Fix segfault for very big size. I did some timming and there is no difference that is higher then noise. fix gh-4020

Replace deleted pages with link to new pages

Added the commit instruction in dev_guide submit text