Merge pull request #2 from longbai/update_readme

Readme update for repo name
remove useless code
add crc
update version
add 406 retry
podspec optimize
add crc32 for formupload
format
add crc for resume
Merge pull request #4 from longbai/add_crc

crc32  check
changelog [ci skip]
Merge pull request #5 from longbai/add_crc

changelog [ci skip]
[ci skip]

add license badge
upload params check
Merge pull request #6 from longbai/up_params

upload params check
changelog [ci skip]
update version [ci skip]
podspec [ci skip]
user crc32 string
Merge pull request #7 from longbai/crcstring

user crc32 string