Move setup_cache stage right after setup
Move setup_cache stage right after setup

So that special directories are added right after
casher is set up

jhass/travis-build,craigcitro/travis-build,akoeplinger/travis-build,jhass/travis-build,JuliaCI/travis-build,craigcitro/travis-build,tmccombs/travis-build,andyli/travis-build,andyli/travis-build,kevmoo/travis-build,JuliaCI/travis-build,akoeplinger/travis-build,kevmoo/travis-build,tmccombs/travis-build