Added autodoc sphinx module to doc builds (#406)

* Added autodoc sphinx module to doc builds

* Renamed doxyfile

docs/conf.py

@@ -30,8 +30,7 @@ release = 'ale.__version__'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = [
-]
+extensions = ['sphinx.ext.autodoc']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -63,4 +62,4 @@ import subprocess, os
 read_the_docs_build = os.environ.get('READTHEDOCS', None) == 'True'
 
 if read_the_docs_build:
-    subprocess.call('cd ../doxygen; doxygen', shell=True)
+    subprocess.call('doxygen', shell=True)