Frame export improvement and static global objects removal:

[NadirRoGue]

• Frame export is now a core feature
• ODU camera definition is removed, and Frame export uses now the same camera and camera parameter definitions as set/get-camera and set/get-camera-params, allowing to use any kind of camera for frame exporting
• Fixed bug in NeuronColorHandler based color handlers
• Removed static global objects in circuit explorer

[Adrien4193]

Just a personal preference but usually I write it like that:

void registerBuilder(std::unique_ptr<NeuronBuilder> builder) { // register builder }

template<typename T, typename ...Args>
void register(Args &&...args)
{
    registerBuilder(std::make_unique<T>(std::forward<Args>(args)...));
}

Then you can register builders with no default constructors and it is always convenient to have a non-template method to do the registering (and the nasty SFINAE is not required as the code would not compile if T is not a Builder anyway).