doc/tutorial/broadcasting.txt has been modified so it doesn't generate an error message during the documentation generation test.

doc/library/tensor/basic.txt contains a link to the tutorial page and links to the deleted section have been removed.

doc/glossary.txt does not contain anymore a link to a section that has been deleted and its linking to the broadcasting tutorial page.

doc/tutorial/broadcasting.txt contains the information about broadcasting and the info from doc/library/basic.txt is now there.

doc/sandbox/broadcasting.txt has been deleted as the tutorial page would contain the information about the broadcasting.

doc/tutorial/broadcasting.txt has been added to the tutorial folder and contains examples illustrating broadcasting.

Improve MissingInput message

Sphinx doc/conf: latex_font_size is deprecated

* Add info on which input of the node has not been provided as input of the function

Port erfinv and erfcinv to new backend.

Make join work inplace

Fix opt crash

Update NEWS_DEV.txt and .mailmap

Python2 3

Create GpuErfinv and GpuErfcinv. Make sure
these GPU ops return the same values as
CPU (scipy.special) equivalent ops.

Update optimization to take account of these ops.

Optimization is applied only with CUDA device

(a warning message is printed if OpenCL is used).

Add tests.

Skip another test when cxx isn't available.