a hack to upgrade pypy2 to 5.7.1

Author: chfw

.travis.yml

@@ -11,6 +11,9 @@ python:
   - 2.7
   - 2.6
 before_install:
+  - cd $HOME
+  - "if [[ $TRAVIS_PYTHON_VERSION == 'pypy' ]]; then deactivate && wget https://bitbucket.org/squeaky/portable-pypy/downloads/pypy-5.7.1-linux_x86_64-portable.tar.bz2 | tar -jxvf && echo 'Setting up aliases...' && ln -s pypy-5.7.1-linux_x86_64-portable pypy2-latest && export PATH=$HOME/pypy2-latest/bin/:$PATH && ln -s ~/pypy2-latest/bin/pypy ~/bin/python && echo 'Setting up pip...' && pypy-latest/bin/pypy -m ensurepip ; fi"
+  - cd -
   - if [[ $TRAVIS_PYTHON_VERSION == "2.6" ]]; then pip install weakrefset; fi
   - if [[ $TRAVIS_PYTHON_VERSION == "2.6" ]]; then pip install flake8==2.6.2; fi
   - if [[ -f min_requirements.txt && "$MINREQ" -eq 1 ]]; then