windows: begin using minidumps upon unrecoverable exceptions.
update zlib to version 1.2.7, May 2nd, 2012
windows: add SetThreadStackGuarantee(20KB) to std::thread creation
more UGLY code that gets neat-o dumping stuff working
Keep retrying a BITS job for up to 30 days. This is an arbitrary value.
oops, missed a compiler warning