sudo: false
language: go
go:
    - 1.5
    - 1.6

sudo: false
language: go
go:
    - 1.6.4
    - 1.7.4

Update Travis to Go 1.6.4 and 1.7.4
Update Travis to Go 1.6.4 and 1.7.4

golint no longer appears to build on Go 1.5, so CI will now only check
against Go 1.6.4 and 1.7.4 since they are the most current stable
release and the last stable release.
