Replace references to Hydrogen release in docs

This replaces references to Hydrogen (in versionadded/versionchanged
directives as well as a few other mentions), to reflect the actual
release number of 2014.1.0.
correct 2014.01.0 -> 2014.1.0
Rename 2014.01.0.rst to 2014.1.0.rst
Merge pull request #9601 from terminalmage/docs

Replace references to Hydrogen release in docs