Consolidating new_<>()

[hkaiser]

This patch introduces a consolidation of hpx::new_<>(). The following overloads have been implemented:

// create single instances of a component
future<id_type> f = new_<Component>(loc, ...);
client c = new_<client>(loc, ...);

// create multiple instances of a component
future<std::vector<id_type>> f = new_<Component[]>(loc, ...);
future<std::vector<client>> f = new_<client[]>(loc, ...);

This patch also introduces 3 distribution policies: default_distribution_policy, binpacking_distribution_policy, and collocating_distribution_policy. All overloads of new_ above can be invoked with one of the distribution policies instead of the target locality loc, for instance:

 future<id_type> f = new_<Component>(colocated(id), ...);

All of the above also allowed to remove the new_colocated API functions, and the distributing_factory and binpacking_factory components.

For convenience, this patch also renames HPX_REGISTER_MINIMAL_COMPONENT_FACTORY to HPX_REGISTER_COMPONENT.

[hkaiser]

@sithhell: The last commit fixed the things you mentioned.

[sithhell]

Is it intended to only use the first locality here? Shouldn't it rather use the "best"?

[hkaiser]

If there is only one locality it's always the first one, no?

[sithhell]

D'oh...