Added matrix build for travis
Added matrix build for travis

tjduigna/exatomic,exa-analytics/exatomic,avmarchenko/exatomic,exa-analytics/exatomic,tjduigna/exatomic,tjduigna/exatomic,avmarchenko/exatomic,avmarchenko/exatomic,alexvmarch/atomic,exa-analytics/exatomic,exa-analytics/atomic,exa-analytics/exatomic,alexvmarch/atomic,exa-analytics/atomic