Replace .cfignore symlink with .gitignore

Instead of having `.cfignore` as a symlink to
`.gitignore`, have them as separate files,
with the same content.

.cfignore

@@ -1 +0,0 @@
-.gitignore

.cfignore

@@ -0,0 +1,78 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+venv/
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+.pytest_cache
+coverage.xml
+test_results.xml
+*,cover
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+.idea/
+.DS_Store
+.vscode
+
+# Frontend dependencies and compiled assets
+app/assets/stylesheets/govuk_template/.sass-cache/
+.sass-cache/
+cache/
+node_modules
+bower_components
+npm-debug.log
+app/templates/vendor
+
+environment.sh
+.envrc
+
+# CloudFoundry
+.cf
+package-lock.json