Regression test for #370
Fixing broken #453 regression test
Make unittests a bit more concise.

This just cleans up some duplicated code.
Removing extraneous pluck
Merge branch 'next' into slava_370
fixing up some cli help problems
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Merge branch 'next' into sam_207

Conflicts:
	src/unittest/rdb_btree.cc
Re-added touch_recency line in btree_slice_t::create (that had been accidentally removed in a merge).