Log Message:
py-cookiecutter: updated to 1.7.0

1.7.0:
Important Changes:
Drop support for EOL Python 3.4
Drop support for EOL Python 3.3
Increase the minimum click version to 7.0

Other Changes:
PEP257 fixing docstrings in exceptions.py.
PEP257 fixing docstrings in replay.py.
PEP257 fixing docstrings in test_unzip.py.
Fixed tests sequence for appveyor, to exclude file not found bug.
Updates REAMDE.md with svg badge for appveyor.
Add missing {% endif %} to Choice Variables example.
Core documentation converted to Markdown format thanks to @wagnernegrao, @insspb
Tests update: use sys.executable when invoking python in python 3 only \ 
environment thanks to @vincentbernat
Prevent click API v7.0 from showing choices when already shown
Test the codebase with python3.8 beta on tox and travis-ci
Add a CODE_OF_CONDUCT.md file to the project
Update docstrings in cookiecutter/main.py, cookiecutter/__init__.py, and \ 
cookiecutter/log.py to follow the PEP 257 style guide
Update docstrings in cookiecutter/utils.py to follow the PEP 257 style guide
Fix grammar in Choice Variables documentation
Update installation docs with links to the Windows Subsystem and GNU utilities
Upgrade flake8 to version 3.5.0
Update tutorial with explanation for how cookiecutter finds the template file
Update CI config files to use TOXENV environment variable
Improve user documentation for writing hooks
Make sure to preserve the order of items in the generated cookiecutter context
Fixed DeprecationWarning for a regular expression on python 3.6
Document use of cookiecutter-template topic on GitHub
Update README badge links
Update prompt.py to match pep257 guidelines
Update link to Jinja2 extensions documentation
Require pip 9.0.0 or newer for tox environments
Use io.open contextmanager when reading hook files
Add more cookiecutter templates to the mix