Use the new build env on Travis
Use the new build env on Travis

more ram, dedicated cpu cores, awesome network perf, fantastic vm boot times

also use mri 2.1 as this uses the latest 2.1.x
grosser/refile,darkleaf/refile,refile/refile,TimLang/refile,div/refile,abitdodgy/refile,Eric-Guo/refile,toothfairy/refile,grosser/refile,jabbawookiees/refile,Axxiss/refile,fabn/refile,costis/refile,monkbroc/refile,y-yagi/refile,ChanChar/refile,manfe/refile,Eric-Guo/refile,monkbroc/refile,Axxiss/refile,ChanChar/refile,carl/refile,acrogenesis-lab/refile,JasOXIII/refile,superacidjax/refile,refile/refile,TimLang/refile,JasOXIII/refile,acrogenesis-lab/refile,grosser/refile,jabbawookiees/refile,abitdodgy/refile,toothfairy/refile,carl/refile,y-yagi/refile,callmeed/refile,toothfairy/refile,fabn/refile,costis/refile,manfe/refile,janko-m/refile,manfe/refile,superacidjax/refile,ChanChar/refile,acrogenesis-lab/refile,abitdodgy/refile,costis/refile,div/refile,div/refile,TimLang/refile,callmeed/refile,jabbawookiees/refile,ninjapanzer/refile,fabn/refile,darkleaf/refile,ninjapanzer/refile,ninjapanzer/refile,refile/refile,monkbroc/refile,callmeed/refile,darkleaf/refile,Eric-Guo/refile,carl/refile,superacidjax/refile,Axxiss/refile,janko-m/refile,JasOXIII/refile,y-yagi/refile