Adjusting install/run Travis scripts to use pypy-2.6.

Adapted from
5e885db2e7/.travis.yml
5e885db2e7/.travis

scripts/install.sh

@@ -17,3 +17,11 @@
 set -ev
 
 pip install tox
+if [[ "${TOX_ENV}" == "pypy" ]]; then
+    git clone https://github.com/yyuu/pyenv.git ${HOME}/.pyenv
+    PYENV_ROOT="${HOME}/.pyenv"
+    PATH="${PYENV_ROOT}/bin:${PATH}"
+    eval "$(pyenv init -)"
+    pyenv install pypy-2.6.0
+    pyenv global pypy-2.6.0
+fi

scripts/run.sh

@@ -16,4 +16,10 @@
 
 set -ev
 
+if [[ "${TOX_ENV}" == "pypy" ]]; then
+    PYENV_ROOT="${HOME}/.pyenv"
+    PATH="${PYENV_ROOT}/bin:${PATH}"
+    eval "$(pyenv init -)"
+    pyenv global pypy-2.6.0
+fi
 tox -e ${TOX_ENV}