add util/curl lib
remove old source from nodehandle
optimize curl.New()
optimize handle.downloadNpm
remove old source from handle.downloadNpm
add curl.Get()
remove message from nodehandle.download()
modify curl.Get() copywritting.
Fixbug of curl.Get()
optimize nodehandle.LsRemote()
change http.Get to curl.Get from nodehandle
modify gnvm install eror copywritting.
Fixbug of when gnvm install x.xx.xx not exist remove x.xx.xx folder
Fixbug of add nodehandle.download() return code 3 'create folder error'
modify curl copywritting
change util.GetLatestVersion http.Get to curl.Get
modify curl.Get copywritting
modify copywritting.
modify copywritting.
Merge branch 'feature/optimize-nodehandle' into develop