* fixed inline functions for modern C standart
* pubsub api, base version
* basic test for pubsub
* update applications.mk, add test file
* more test for pubsub
* remove unimplemented files, cleanup header file
* remove legacy tests, check unsubscribe not call cb
* implement deleting mutex, fail test
* release mutex before deleting
Co-authored-by: aanper <mail@s3f.ru>
