Fix minor details of package structure

Author: pdpiech

MANIFEST.in

@@ -1,2 +1 @@
-include README.txt LICENSE.txt
-
+include README.md LICENSE.txt

setup.py

@@ -2,10 +2,10 @@
 
 if __name__ == "__main__":
 
-    try:
-        import pypandoc
-        long_description = pypandoc.convert('README.md', 'rst')
-    except(IOError, ImportError):
+    try:
+        import pypandoc
+        long_description = pypandoc.convert('README.md', 'rst')
+    except(IOError, ImportError):
         long_description = open('README.md').read()
 
     __version__ = "0.8.1"
@@ -24,7 +24,7 @@
               "Topic :: Scientific/Engineering"
           ],
           url=base_url,
-          download_url="{0}/archive/prefpy-{1}.tar.gz".format(base_url, __version__),
+          download_url="{0}/archive/v{1}.tar.gz".format(base_url, __version__),
           author="Peter Piech",
           license="GPL-3",
           packages=["prefpy"],