REBASEME: lockfree_vector fixes
Basic lockfree_vector tests
REBASEME: thread_local_ptr implementation
REBASEME: lockfree_vector test
Tests for thread_local_ptr
An empty CLSM skeleton
Further CLSM infrastructure
Make thread_local_ptr header-only
Add a local CLSM component

The current implementation works since we cheat and use our sequential
LSM within each thread.
Integrate CLSM into pq_seq tests
Start making pq_par tests generic