Merge branch 'extract_easy_common_libs'

.gitignore

Makefile.am

src/common/address.h

src/common/address_set.c

src/common/address_set.h

src/common/buffers.c

src/common/buffers.h

src/common/compat.h

src/common/compat_libevent.c

src/common/compat_libevent.h

src/common/compat_threads.h

src/common/container.c

src/common/include.am

src/common/pubsub.c

src/common/pubsub.h

src/common/sandbox.c

src/common/sandbox.h

src/common/timers.h

src/common/token_bucket.h

src/common/torlog.h