Bump Travis to Go 1.7
Bump Travis to Go 1.7

mdhender/hugo,mitchchn/hugo,tubo028/hugo,MarkDBlackwell/hugo,mayah/hugo,mdhender/hugo,mdhender/hugo,anthonyfok/hugo,fedelibre/hugo,digitalcraftsman/hugo,fedelibre/hugo,Zenithar/hugo,jygastaud/hugo,mdhender/hugo,anthonyfok/hugo,gohugoio/hugo,gohugoio/hugo,ffrizzo/hugo,anthonyfok/hugo,ffrizzo/hugo,mitchchn/hugo,tubo028/hugo,bogem/hugo,digitalcraftsman/hugo,jygastaud/hugo,fedelibre/hugo,gohugoio/hugo,mayah/hugo,MarkDBlackwell/hugo,bogem/hugo,fedelibre/hugo,Zenithar/hugo