download pandoc

setup.py

@@ -10,7 +10,15 @@ long_description = ""
 try:
     long_description = pypandoc.convert('README.md', 'rst')
 except OSError as e:
-    print("Pypandoc import failed, please install pandoc.")
+    print("Pypandoc import failed, trying to download pancdoc...")
+    pypandoc.download_pandoc()
+
+print("Trying to convert again...")
+
+try:
+    long_description = pypandoc.convert('README.md', 'rst')
+except OSError as e:
+    print("Readme conversion failed.")
     sys.exit(1)
 
 # cv_version.py should be generated by running find_version.py