Now capable of treating sample_weights in feature space
updated AMI documentation for issue #2686
.. _clustering:
[DOC] Updated install instructions for Arch Linux

Packages are available in the official repositories for Python 2 & 3
update ami doc for feedback on PR
Merge pull request #3061 from jess010/ami-docs

[MRG] updated AMI documentation
Ridge regression now can use sample_weights in feature space. Summary commit over around 20 commits to avoid failing tests
Fix merge conflict and missing URL ref in whats_new.rst
DOC Fix ``copy_X `` default in documentation

The code uses ``True`` as the default, but the documentation incorrectly
stated that ``False`` was the default.
Merge pull request #3070 from luispedro/fix-enet-doc

DOC Fix ``copy_X `` default in documentation
Merge pull request #3062 from abatula/archlinux-install-doc

[DOC] Updated install instructions for Arch Linux