Removed stats, sync_log and lw_thread wrappers.

These are best implemented at the higher level. Different users will care
about different aspects and want different types of stats. If common patterns
emerge, we can wrappers around the APIs instead of embedding it inside.
Added boilerplate copyright notice.
Adding a bogus commit to serve as a mark since we are removing the
lw_lock_stats, lw_thread and lw_sync_log from now on and, in case we
regret, this will allow us to rollback.
Merge branch 'ngrg-coderemove'

Conflicts:
	src/Makefile.am
	src/lw_lock.h
	src/lw_rwlock.h
Merge branch 'copyright'

Conflicts:
	src/lw_lock.c
Fixing merge issues and removing lw_lock_stats from lw_rwlock.c