LGTM

This looks innocent enough, it should be fine.

PS. What is this travis-ci thing, and should we be using this more and configuring it appropriately?

I wanted to setup continuous integration for testing my local cpp-netlib changes. It is not configured, that's why it's failing. With a tiny bit of work (writing proper .travis.yml configuration) it should be fairly easy to setup CI for cpp-netlib. CI should help with verifying simple bugfixes as build system or for running tests. Unfortunately it's for Linux only, but still it's better this than nothing.

If I got spare time I could look into that and propose some cfg if appropriate.

[edit] Using Travis for cpp-netlib would probably require having Boost libraries in another git submodule, as worker machines offer Boost 1.48 IIRC.