AIRFLOW-959 Cleanup and reorganize .gitignore

.gitignore

@@ -1,32 +1,126 @@
-.idea/*
-*.bkp
-*.egg-info
-*.pyc
-.DS_Store
-.ipynb*
-.coverage
-.python-version
-airflow/git_version
-airflow/www/static/coverage/
-airflow.db
+# Airflow configuration
 airflow.cfg
+unittests.cfg
 airflow_login.py
-build
-cover
 dbinit.py
-docs/_*
-dist
-env
 initdb.py
-logs
-MANIFEST
 secrets.py
-sftp-config.json
-unittests.cfg
-error.log
+
+# Airflow sqlite databases
+airflow.db
 unittests.db
-rat-results.txt
-/.eggs/
-/.tox/
-venv
+
+# Airflow temporary artifacts
+airflow/git_version
+airflow/www/static/coverage/
+logs/
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# 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
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# dotenv
+.env
+
+# virtualenv
+.venv
+venv/
+ENV/
+
+# Spyder project settings
+.spyderproject
+
+# Rope project settings
+.ropeproject
+
+# PyCharm
+.idea/
+
+# vim
 *.swp
+
+# OSX
+.DS_Store
+
+# SQL Server backups
+*.bkp
+
+# Spark
+rat-results.txt