v3.0.1

Bugfix release for libmodule:

• module_deregister_fd() will now gracefully remove the fd from epoll. Note that a close() is enough to remove it from epoll, but if autoclose is false, it won't be closed. Thus we need to assure to remove it from epoll.
• When deregistering a module, actually stop it even if it was already stopped, to free/close any registered fd while it was stopped.
• PAUSED module have to be delivered PubSub messages, but they will only receive them as soon as they get resumed (thus RUNNING state).
• module_stop() can be called on PAUSED module too (and not IDLE as before!)
• Set FD_CLOEXEC flag in non-linux poll implementation for both pipe and kqueue
• Fixed CMakeLists to runt tests even if valgrind could not be found
• Special handling of STDIN_FILENO in poll_set_new_evt for epoll/kqueue