minor: added note about requiring ghostscript package to latex controller
minor: added note about requiring ghostscript package to latex controller

nilclass/echosocial,adammck/crabgrass,riseuplabs/crabgrass,adammck/crabgrass,adammck/crabgrass,ajturner/crisiscommons,geoiq/digitalgazette,riseuplabs/crabgrass,adammck/crabgrass,riseuplabs/crabgrass,ajturner/crisiscommons,nilclass/echosocial,geoiq/digitalgazette,riseuplabs/crabgrass,ajturner/crisiscommons,nilclass/echosocial,riseuplabs/crabgrass,geoiq/digitalgazette,riseuplabs/crabgrass,geoiq/digitalgazette,riseuplabs/crabgrass,ajturner/crisiscommons,nilclass/echosocial