add readme
add make downloadtoken
add for readme2
fix
add move func for rs
new README
Merge pull request #17 from rwifeng/feature/func_move

add move func for rs
Merge pull request #18 from rwifeng/makedownToken

add make downloadtoken
Merge pull request #16 from rwifeng/b_rwf_readme2

B rwf readme2
Merge pull request #19 from qiniu/develop

Release v3.2.3