Fix some stuff that clang -Weverything was bitching about

A Simple Condition Variable Example (cvsimple.c)

Add LICENSE and README.md

llist_threads

llist

Multithreaded Matrix-Multiply Program (matrix_peered.c)

Serial Matrix-Multiply Program (matrix_serial.c)

Specifying a Thread's Exit Status (exit_status_alternative.c)

Code that Examines the Identity of the Calling Thread (ident.c)

Concurrent Threads and a Mutex: do_one_thing Routine

A Simple C Program with Concurrent Threads and a Mutex (simple_mutex.c)

A Simple C Program with Concurrent Threads (simple_threads.c)

A Simple C Program with Concurrent Processes

A Simple C Program (simple.c)

Initial Commit