Merge pull request #54 from andreas-h/docnetworkx

DOC: add networkx requirement to install intructions

Author: gtaylor

doc_src/global.txt

@@ -5,6 +5,7 @@
 .. _Python: http://python.org
 .. _nose: http://somethingaboutorange.com/mrl/projects/nose/
 .. _NumPy: http://www.numpy.org/
+.. _networkx: https://networkx.github.io/
 
 .. _virtualenv: http://pypi.python.org/pypi/virtualenv
 .. _virtualenvwrapper: http://www.doughellmann.com/projects/virtualenvwrapper/

doc_src/installation.rst

@@ -7,7 +7,7 @@ Installation
 
 python-colormath currently requires Python 2.7 or Python 3.3+. There are no
 plans to add support for earlier versions of Python 2 or 3. The only other
-requirement is NumPy_.
+requirements are NumPy_ and networkx_.
 
 For those on Linux/Unix Mac OS, the easiest route will be :command:`pip` or
 :command:`easy_install`::