update go-md2man to v1.0.5
Due to the issue of go-md2man, a numbered list in `man docker login` was not rendered correctly.
-FROM golang:1.4
+FROM golang:1.6.2
RUN mkdir -p /go/src/github.com/cpuguy83
RUN mkdir -p /go/src/github.com/cpuguy83 \
- && git clone -b v1.0.3 https://github.com/cpuguy83/go-md2man.git /go/src/github.com/cpuguy83/go-md2man \
+ && git clone -b v1.0.5 https://github.com/cpuguy83/go-md2man.git /go/src/github.com/cpuguy83/go-md2man \
&& cd /go/src/github.com/cpuguy83/go-md2man \
&& go get -v ./...
CMD ["/go/bin/go-md2man", "--help"]
