Reorganizes Travis settings to reduce noise in the log
Reorganizes Travis settings to reduce noise in the log

such that SBT and unzip messages can be folded into the `install` step.
Also puts checkstyle in `before_install` to error the build earlier upon
coding style mistakes.

AlexisBRENON/deepdive,closedLoop/deepdive,AlexisBRENON/deepdive,nvoron23/deepdive,RTsWorld/deepdive,Atlas7/deepdive,Gela/deepdive,HazyResearch/deepdive,topojoy/deepdive,infinitespace/deepdive,infinitespace/deepdive,RTsWorld/deepdive,kod3r/deepdive,sai16vicky/deepdive,zifeishan/deepdive,closedLoop/deepdive,sai16vicky/deepdive,nvoron23/deepdive,maalmeida1837/deepdive,sai16vicky/deepdive,vasyvas/deepdive,maalmeida1837/deepdive,nvoron23/deepdive,RTsWorld/deepdive,vasyvas/deepdive,infinitespace/deepdive,closedLoop/deepdive,sky-xu/deepdive,zifeishan/deepdive,nvoron23/deepdive,AlexisBRENON/deepdive,Gela/deepdive,vasyvas/deepdive,wgapl/deepdive,topojoy/deepdive,topojoy/deepdive,RTsWorld/deepdive,kod3r/deepdive,kod3r/deepdive,vasyvas/deepdive,closedLoop/deepdive,vsoch/deepdive,sky-xu/deepdive,wgapl/deepdive,maalmeida1837/deepdive,AlexisBRENON/deepdive,HazyResearch/deepdive,HazyResearch/deepdive,maalmeida1837/deepdive,vsoch/deepdive,sai16vicky/deepdive,shahin/deepdive,zifeishan/deepdive,Atlas7/deepdive,Gela/deepdive,Gela/deepdive,infinitespace/deepdive,sai16vicky/deepdive,wgapl/deepdive,shahin/deepdive,infinitespace/deepdive,vsoch/deepdive,wgapl/deepdive,infinitespace/deepdive,HazyResearch/deepdive,kod3r/deepdive,Atlas7/deepdive,Atlas7/deepdive,kod3r/deepdive,topojoy/deepdive,closedLoop/deepdive,AlexisBRENON/deepdive,zifeishan/deepdive,maalmeida1837/deepdive,vasyvas/deepdive,wgapl/deepdive,vsoch/deepdive,RTsWorld/deepdive,topojoy/deepdive,zifeishan/deepdive,Atlas7/deepdive,Gela/deepdive,nvoron23/deepdive,vsoch/deepdive