use version from package init also for sphinx docs, insert toplevel dir into sys.path

docs/conf.py

@@ -12,13 +12,28 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
+import codecs
 import os
+import re
+import sys
+
+
+def read_file(filename, encoding='utf8'):
+    """Read unicode from given file."""
+    with codecs.open(filename, encoding=encoding) as fd:
+        return fd.read()
+
+
+here = os.path.abspath(os.path.dirname(__file__))
+
+# read version number (and other metadata) from package init
+init_fn = os.path.join(here, '..', 'letsencrypt', '__init__.py')
+meta = dict(re.findall(r"""__([a-z]+)__ = "([^"]+)""", read_file(init_fn)))
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-#sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath(os.path.join(here, '..')))
 
 # -- General configuration ------------------------------------------------
 
@@ -58,9 +73,9 @@ copyright = u'2014, Let\'s Encrypt Project'
 # built documents.
 #
 # The short X.Y version.
-version = '0.1'
+version = '.'.join(meta['version'].split('.')[:2])
 # The full version, including alpha/beta/rc tags.
-release = '0.1'
+release = meta['version']
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.