Release 0.18.1

Changes:

- (libgit2#203) Now Repository.head returns the resolved reference, not the
  commit

- (libgit2#210) Fix refcount error in Repository.create_remote

- (libgit2#212) Improved diff documentation

Thanks to Jun Omae and Nico von Geyso.

Author: jdavid

docs/conf.py

@@ -50,7 +50,7 @@
 # The short X.Y version.
 version = '0.18'
 # The full version, including alpha/beta/rc tags.
-release = '0.18.0'
+release = '0.18.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

pygit2/version.py

@@ -23,4 +23,4 @@
 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 # Boston, MA 02110-1301, USA.
 
-__version__ = '0.18.0'
+__version__ = '0.18.1'