some windows changes
Merge branch 'master' of https://github.com/alekh/vowpal_wabbit
Merge branch 'master' of https://github.com/alekh/vowpal_wabbit
Merge branch 'master' of https://github.com/alekh/vowpal_wabbit
Merge branch 'master' of https://github.com/alekh/vowpal_wabbit
breaking deadlock