Fix image links [ci skip]

Author: asottile

README.rst

@@ -5,15 +5,15 @@ libsass-python: Sass_/SCSS for Python
    :alt: PyPI
    :target: https://pypi.python.org/pypi/libsass
 
-.. image:: https://travis-ci.org/dahlia/libsass-python.svg?branch=python
+.. image:: https://travis-ci.org/dahlia/libsass-python.svg
    :target: https://travis-ci.org/dahlia/libsass-python
    :alt: Build Status
 
-.. image:: https://ci.appveyor.com/api/projects/status/yghrs9jw7b67c0ia/branch/python?svg=true
+.. image:: https://ci.appveyor.com/api/projects/status/yghrs9jw7b67c0ia/branch/master?svg=true
    :target: https://ci.appveyor.com/project/dahlia/libsass-python
    :alt: Build Status (Windows)
 
-.. image:: https://img.shields.io/coveralls/dahlia/libsass-python/python.svg
+.. image:: https://img.shields.io/coveralls/dahlia/libsass-python/master.svg
    :target: https://coveralls.io/r/dahlia/libsass-python
    :alt: Coverage Status
 

docs/index.rst

@@ -110,21 +110,21 @@ GitHub (Git repository + issues)
 Travis CI
    https://travis-ci.org/dahlia/libsass-python
 
-   .. image:: https://travis-ci.org/dahlia/libsass-python.svg?branch=python
+   .. image:: https://travis-ci.org/dahlia/libsass-python.svg
       :target: https://travis-ci.org/dahlia/libsass-python
       :alt: Build Status
 
 AppVeyor (CI for Windows)
    https://ci.appveyor.com/project/dahlia/libsass-python
 
-   .. image:: https://ci.appveyor.com/api/projects/status/yghrs9jw7b67c0ia/branch/python?svg=true
+   .. image:: https://ci.appveyor.com/api/projects/status/yghrs9jw7b67c0ia/branch/master?svg=true
       :target: https://ci.appveyor.com/project/dahlia/libsass-python
       :alt: Build Status (Windows)
 
 Coveralls (Test coverage)
    https://coveralls.io/r/dahlia/libsass-python
 
-   .. image:: https://img.shields.io/coveralls/dahlia/libsass-python.svg
+   .. image:: https://img.shields.io/coveralls/dahlia/libsass-python/master.svg
       :target: https://coveralls.io/r/dahlia/libsass-python
       :alt: Coverage Status