move file.hpp & storage_interface.hpp to avhttp filter

Signed-off-by: Jack <jack.wgm@gmail.com>
revert avhttp.cpp

Signed-off-by: Jack <jack.wgm@gmail.com>
Merge branch 'master' of github.com:avplayer/avhttp
disable warning 4250 on msvc

Signed-off-by: Jack <jack.wgm@gmail.com>
add missing boost.format header

Signed-off-by: Jack <jack.wgm@gmail.com>