Updated Rakefile to remove use of *nix specific commands
Updated Rakefile to remove use of *nix specific commands

Only `sh` statements left are either 'java' or 'git' commands,
which should work on Windows, though I still need to test

fat/jquery,RubyLouvre/jquery,fat/jquery,jquery/jquery,demetr84/Jquery,ilyakharlamov/jquery-xul,praveen9102/Shazam,diracdeltas/jquery,eburgos/jquery,jquery/jquery,sancao2/jquery,dtjm/jquery,hoorayimhelping/jquery,eburgos/jquery,kpozin/jquery-nodom,mislav/jquery,sancao2/jquery,demetr84/Jquery,roytoo/jquery,quiaro/request-agent,gnarf/jquery,Karyotyper/jquery,jquery/jquery,npmcomponent/component-jquery,RubyLouvre/jquery,kpozin/jquery-nodom,jcutrell/jquery,chitranshi/jquery,roytoo/jquery,Karyotyper/jquery,hoorayimhelping/jquery,isaacs/jquery,sancao2/jquery,Karyotyper/jquery,npmcomponent/component-jquery,diracdeltas/jquery,roytoo/jquery,chitranshi/jquery,dtjm/jquery,ilyakharlamov/jquery-xul,gnarf/jquery,rwaldron/jquery,jcutrell/jquery,diracdeltas/jquery,scottjehl/jquery,isaacs/jquery,scottjehl/jquery,mislav/jquery,eburgos/jquery,rwaldron/jquery,praveen9102/Shazam