ref #52 : improve greedy sampling strategy

close #32 : add comment about thread-safety of the C-style API

ref #57, #62, #63 : remove unions in C-api + remove designated initializers

ref #35 : add <stdbool.h> to whisper.h

ref #9 : add API documentation in whisper.h

Adding sanitizer tests

ref #10 : option to keep context in "stream" example

ref #16, #22 : add "offset" argument

Improve result printing

Extend C-style API with full inference methods

Initial C-style interface for whisper.cpp