JD Brossillon

Some small fixes to allow compilation with clang++ and -Werror.

Allowing user to zoom in and out even without a mouse wheel, for example using a keyboard shortcut or buttons, may be nice feature.

Using iceweasel 44.0.2 web interface does not work and output the following error: `"Error: [ng:areq] Argument 'indexController' is not a function, got undefined http://errors.angularjs.org/1.4.10/ng/areq?p0=indexController&p1=not%20a%20function%2C%20got%20undefined minErr/