Install PyEnv, the required Python version and package requirements on Codeship

pyenv-on-codeship.sh

export PYENV_ROOT="${HOME}/cache/.pyenv"
if [ -d ${PYENV_ROOT} ]; then (cd ${PYENV_ROOT}; git pull --rebase); else git clone https://github.com/yyuu/pyenv.git ${PYENV_ROOT}; fi
export PATH="${PYENV_ROOT}/bin:${PATH}"
eval "$(pyenv init -)"
pyenv install -s; echo 'lofasz'
pip install --upgrade pip setuptools
[ -f requirements.txt ] && pip install -r requirements.txt
[ -f requirements.development.txt ] && pip install -r requirements.development.txt