[doc] Updated conf to latest

doc/conf.py

@@ -30,9 +30,29 @@ extensions = [
 import sphinx
 if sphinx.__version__ >= "1.4.1":
     extensions.append('sphinx.ext.imgmath')
+    imgmath_image_format = 'svg'
 else:
     extensions.append('sphinx.ext.pngmath')
 
+# Be picky about warnings
+nitpicky = True
+
+# Ignores stuff we can't easily resolve on other project's sphinx manuals
+nitpick_ignore = []
+
+# Allows the user to override warnings from a separate file
+if os.path.exists('nitpick-exceptions.txt'):
+  for line in open('nitpick-exceptions.txt'):
+    if line.strip() == "" or line.startswith("#"):
+        continue
+    dtype, target = line.split(None, 1)
+    target = target.strip()
+    try: # python 2.x
+        target = unicode(target)
+    except NameError:
+        pass
+    nitpick_ignore.append((dtype, target))
+
 # Always includes todos
 todo_include_todos = True
 
@@ -216,8 +236,17 @@ autodoc_default_flags = [
   ]
 
 # For inter-documentation mapping:
-from bob.extension.utils import link_documentation
-intersphinx_mapping = link_documentation()
+from bob.extension.utils import link_documentation, load_requirements
+sphinx_requirements = "extra-intersphinx.txt"
+if os.path.exists(sphinx_requirements):
+    print("Hello, world!")
+    intersphinx_mapping = link_documentation(additional_packages=load_requirements(sphinx_requirements))
+else:
+    intersphinx_mapping = link_documentation()
+
+# Link SQLAlchemy by hand (not supported by link_documentation())
+intersphinx_mapping['sqlalchemy'] = ('http://docs.sqlalchemy.org/en/latest',
+    None)
 
 # We want to remove all private (i.e. _. or __.__) members
 # that are not in the list of accepted functions