Merge branch 'master' of https://github.com/jonioni/chevron into jonioni-master

diff --cc chevron/renderer.py
index e1ae55bdd74702d64b9fd1f2995f59bfecd78113,c6b19e90b9a81b880fb34c6653d7343d87e3ca19..9716ecb682e9831b2c567567afc1e625e5439087
--- 1/chevron/renderer.py
--- 2/chevron/renderer.py
+++ b/chevron/renderer.py
@@@ -92,8 -90,8 +92,8 @@@ def _get_partial(name, partials_dict, p
          # Nope...
          try:
              # Maybe it's in the file system
-             path = partials_path + '/' + name + '.' + partials_ext
+             path = partials_path + '/' + name + ('.' + partials_ext if partials_ext else '')
 -            with open(path, 'r') as partial:
 +            with io.open(path, 'r', encoding='utf-8') as partial:
                  return partial.read()
  
          except IOError: