remove data_files usage of README.txt installation in current directory

CHANGES.txt

@@ -4,6 +4,10 @@ Change History
 1.6.4 (unreleased)
 ==================
 
+- remove `data_files` from `setup.py`, which was installing README.txt
+  in current directory during installation
+  [Domen Kožar]
+
 - fixed all builds on travis-ci
   [Domen Kožar]
 

setup.py

@@ -77,8 +77,6 @@ setup(
     license = "ZPL 2.1",
     keywords = "development build",
     url='http://pypi.python.org/pypi/zc.buildout',
-
-    data_files = [('.', ['README.txt'])],
     packages = ['zc', 'zc.buildout'],
     package_dir = {'': 'src'},
     namespace_packages = ['zc'],