Add support for custom operators file as an optional QBE_CUSTOM_OPERATORS in settings.py
Add support for custom operators file as an optional QBE_CUSTOM_OPERATORS in settings.py

laiyonghao/qbe,sohonetlabs/qbe,versae/qbe,laiyonghao/qbe,laiyonghao/qbe,versae/qbe,sohonetlabs/qbe,sohonetlabs/qbe,versae/qbe