Revert "Merge pull request #66 from lintianzhi/feature/afnetworking1.x"

This reverts commit 9b4697a9304406d07c24dc698849e0927f7ebf5e, reversing
changes made to baab5ebd874732f24ff698cdf3e31b2d08ee0d3b.
Merge pull request #68 from longbai/revert-merge

Revert "Merge pull request #66 from lintianzhi/feature/afnetworking1.x"