add test follow & block user
add test follow & block user

	new file:   tests/test_user.py

thcode/firefly,killpanda/firefly,ruitian/firefly,mozillazg/firefly,python-cn/firefly,python-cn/firefly,halfcrazy/firefly,halfcrazy/firefly,thcode/firefly,Junnplus/firefly,matrixorz/firefly,halfcrazy/firefly,Junnplus/firefly,matrixorz/firefly,mozillazg/firefly,Junnplus/firefly,dongweiming/firefly,dongweiming/firefly,ruitian/firefly,dongweiming/firefly,halfcrazy/firefly,thcode/firefly,python-cn/firefly,Junnplus/firefly,killpanda/firefly,killpanda/firefly,ruitian/firefly,matrixorz/firefly,thcode/firefly,killpanda/firefly,python-cn/firefly,ruitian/firefly,mozillazg/firefly