Tagging 4.8.0 for release on pypi.

See github releases for more information.

Merge pull request #346 from ndawe/master

update ROOT/root_numpy comparison with latest ROOT

Merge pull request #297 from ndawe/master

tests missing from packages list

bump to 4.7.1: pypi no longer allows reuploads

Merge pull request #293 from ndawe/master

setup.py improvements

Merge pull request #265 from ndawe/master

[MRG] fix handling of fixed and variable length array expressions

warning about TMVA interface change

Merge pull request #255 from ndawe/master

target deprecations for release 5.0.0

Merge pull request #237 from ndawe/master

Support for THn and THnSparse in hist2array

Merge pull request #219 from ndawe/master

bump to version 4.4.0