Update 2017-07-20-backward-compatibility.md (#39)
Update 2017-07-20-backward-compatibility.md (#39)


davidzchen/bazel-blog,bazelbuild/bazel-blog,laszlocsomor/bazel-blog,davidzchen/bazel-blog,bazelbuild/bazel-blog,laszlocsomor/bazel-blog,bazelbuild/bazel-blog,laszlocsomor/bazel-blog,davidzchen/bazel-blog,laszlocsomor/bazel-blog,davidzchen/bazel-blog