fix setup.py and use setuptools_scm dep for tox

.travis.yml

@@ -3,7 +3,7 @@ language: python
 python:
     - '3.5.0b3'
 # command to install dependencies
-install: "pip install -U tox"
+install: "pip install -U tox setuptools_scm"
 # # command to run tests
 env:
   matrix:

setup.py

@@ -4,7 +4,7 @@ setup(
     name="pytest-xdist",
     use_scm_version={'write_to': 'xdist/_version.py'},
     description='py.test xdist plugin for distributed testing and loop-on-failing modes',
-    long_description=open('README.txt').read(),
+    long_description=open('README.rst').read(),
     license='MIT',
     author='holger krekel and contributors',
     author_email='pytest-dev@python.org,holger@merlinux.eu',

tox.ini

@@ -7,6 +7,7 @@ envlist=
 changedir=testing
 deps =
     pycmd
+    setuptools_scm # to avoid .eggs
     pytest24: pytest~=2.4.0
     pytest25: pytest~=2.5.0