add some jruby on windows compatibility
add some jruby on windows compatibility

Eric-Guo/spork,paypronl/spork,paypronl/spork,sporkrb/spork,jarmo/spork,selenetelenav/spork,chrismdp/spork,sporkrb/spork,selenetelenav/spork,Eric-Guo/spork,jarmo/spork