add test.lua tests for spatialaveragepooling; remove non-batch tests for spatialmaxpooling
add test.lua tests for spatialaveragepooling; remove non-batch tests for spatialmaxpooling

hughperkins/clnn,szagoruyko/clnn,hughperkins/clnn,hughperkins/clnn,hughperkins/clnn,brunoro/clnn,brunoro/clnn,szagoruyko/clnn,brunoro/clnn,szagoruyko/clnn,szagoruyko/clnn,brunoro/clnn