Forgot to backout of doc folder in Travis
Forgot to backout of doc folder in Travis

Added `cd ..` to before_install rule

eusoubrasileiro/fatiando,victortxa/fatiando,drandykass/fatiando,victortxa/fatiando,rafaelmds/fatiando,cmeessen/fatiando,eusoubrasileiro/fatiando,santis19/fatiando,cmeessen/fatiando,mtb-za/fatiando,eusoubrasileiro/fatiando_seismic,drandykass/fatiando,fatiando/fatiando,mtb-za/fatiando,rafaelmds/fatiando,eusoubrasileiro/fatiando_seismic,santis19/fatiando,eusoubrasileiro/fatiando,fatiando/fatiando