Building Emscripten Project with an IDE?

I've recently discovered Emscripten as a way of writing native code and running it in a web browser.

I'd like to work with an IDE for code completion and be able to customize the build process for Emscripten.

The only tool I've found to build Emscripten this way is with VS2010 which has very limited c++11 support so that's not desirable.

I thought of using VS2013 and writing a custom build script but I've never used VS so I'm unsure how to do that or if it's even possible.

What are people using to work with Emscripten?