Multithreading structures implementation

[isoldpower]

PR includes 3 structures:

• Linked List. Standard singly-linked list with all the default operations;
• Bounded Queue. Queue that is limited in its size;
• Unbounded Queue. Queue that is unlimited in its size;

Each of the structures is implemented in 2 variations:

• Lock-free variation. Doesn't use memory locks with mutexes or other tools;
• Fine-grained lock. Utilizes lock patterns with mutexes to achieve thread-safety;

Each structure is tested for performance, peak memory overhead and average memory consumption.