* Don't use stint's nim.cfg during CI to compile koch
* skip both project and parentcfg?
* reorder switches
* everything should skip the cfg
* Use .nimble switch - nim.cfg causes problem when updating packages
* remove the skip compile flags
* Add corner cases to test suite
* Add failing div2n1n case
* Fix test and fix#30
* Add to tests
* Fix failing tests due to Nim string change between Apr 27 and Apr 29 (doc: 5237ef4f52)