* - Add: rules/go_unknown_command for misspelled go commands.
- Add: tests/test_go_unknown_command which tests match and mismatch case of rules/go_unknown_command.
- Change: Added description of go_unknown_command to README.md.
* Add: test_get_new_command for testing rules.go_unknown_command.test_get_new_command method.
* Change: go_unknown_command.match now uses for_app decorator.
* Add: get_golang_commands which dynamically gets golang possible commands.
* Fix: cache proper function instead of its result.
