remove version info from dictionary comment
Revert "update Copyright 2011 to 2013"

This reverts commit 8c9c3ea05090d61b470d435aa1f21dbb277d4f1a.
revert folded comment at read.go
revert folded comment at type.go
fix using iots
remove credential frame comment
fix GoAwayStatus difine & use
remove unuseful comment
revert controlBit to inline
fix ErrorCode difinition