fix another integer overflow issue from switching to chrono

git-svn-id: http://libtorrent.googlecode.com/svn@10155 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
another boost chrono fix

git-svn-id: http://libtorrent.googlecode.com/svn@10156 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
streaming fix

git-svn-id: http://libtorrent.googlecode.com/svn@10157 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
back port streaming fix

git-svn-id: http://libtorrent.googlecode.com/svn@10158 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
fixed disk_io_job flags being used as file flags

git-svn-id: http://libtorrent.googlecode.com/svn@10159 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
support unaligned bitfield buffers

git-svn-id: http://libtorrent.googlecode.com/svn@10160 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
merge bitfield fix from RC_1_0 (although, fix doesn't apply)

git-svn-id: http://libtorrent.googlecode.com/svn@10161 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda
track RTT of piece requests

git-svn-id: http://libtorrent.googlecode.com/svn@10162 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda