Update .travis.yml
Update .travis.yml

Update to send build information to slack channel
ltcarbonell/Rater-System,UF-COP5035/Rater-System,UF-COP5035/Rater-System,christopher1030123/Rater-System,christopher1030123/Rater-System,christopher1030123/Rater-System,ciarapowell/Rater-System,ciarapowell/Rater-System,ltcarbonell/Rater-System,ltcarbonell/Rater-System,ciarapowell/Rater-System,UF-COP5035/Rater-System