Concurrent lock-free data structures for non-volatile RAM

Dependencies:

• nvml (https://github.com/pmem/nvml)
• nv-jemalloc (https://github.com/LPD-EPFL/nv-jemalloc)
• libnvram (https://github.com/LPD-EPFL/libnvram)
• libatomic_ops (https://github.com/ivmai/libatomic_ops/)