clean up setup.py a bit

Author: nschloe

setup.py

@@ -21,15 +21,14 @@ def read(fname):
     version=about["__version__"],
     packages=find_packages(),
     url="https://github.com/nschloe/matplotlib2tikz",
-    download_url="https://pypi.python.org/pypi/matplotlib2tikz",
     author=about["__author__"],
     author_email=about["__email__"],
-    install_requires=["matplotlib >= 1.4.0", "numpy", "Pillow >= 3.0.0", "six"],
+    install_requires=["matplotlib >= 1.4.0", "numpy", "six"],
     extras_require={
         "all": ["pipdate >= 0.3.0, <0.4.0"],
         "update": ["pipdate >= 0.3.0, <0.4.0"],
     },
-    description="convert matplotlib figures into TikZ/PGFPlots",
+    description="Convert matplotlib figures into TikZ/PGFPlots",
     long_description=read("README.md"),
     long_description_content_type="text/markdown",
     license=about["__license__"],