Merge pull request #43 from elbeejay/doc-mathjax

switch to mathjax for docs math

Author: wrightky

docs/source/conf.py

@@ -39,7 +39,7 @@
               'sphinx.ext.autosummary',
               'sphinx.ext.napoleon',
               'sphinx.ext.graphviz',
-              'sphinx.ext.imgmath',
+              'sphinx.ext.mathjax',
               'sphinx.ext.githubpages',
               'matplotlib.sphinxext.plot_directive',
               'sphinx.ext.viewcode',