oauth2 refactor: add QBox_Client_InitNoAuth
QBox_Client_reset
QBox_Io_PutFile, QBox_Io_PutBuffer
QBox_Io_Put
unit test: to do
QBox_Client: add bheader (response header)
QBox_Client: respHeader
QBox_Io_call
remove 100 continue
QBox_Io_Put: to be continued
testcase ok
CHANGELOG
Merge pull request #31 from xushiwei/feature/stream

support qiniu/api/io