Change Travis' test script to `make test`; close #45
Change Travis' test script to `make test`; close #45

merged a patch from @nicolasmccurdy.

pze/streem,lvfeng1130/streem,pze/streem,VorontsovIE/streem,mattn/streem,ShigeruIchinoki/streem,ShigeruIchinoki/streem,0x00evil/streem,ShigeruIchinoki/streem,suzukaze/streem,VorontsovIE/streem,davydovanton/streem,Ye-Yong-Chi/streem,0x00evil/streem,lvfeng1130/streem,VorontsovIE/streem,matz/streem,pze/streem,Ye-Yong-Chi/streem,davydovanton/streem,0x00evil/streem,matz/streem,suzukaze/streem,mattn/streem,0x00evil/streem,lvfeng1130/streem,suzukaze/streem,Ye-Yong-Chi/streem,davydovanton/streem,VorontsovIE/streem,Ye-Yong-Chi/streem,suzukaze/streem,lvfeng1130/streem,ShigeruIchinoki/streem,davydovanton/streem,pze/streem,mattn/streem