Static evaluation of activators

[Tishka17]

Based on #9

Though it is not set explicitly, each activation function can be static or dynamic

• Static activator is called only once when graph is built. All inactive providers are stripped from graph
• Dynamic activator is called each time we need to decide which provider should be used.

If a dependency has multiple dynamically activated providers they are moved to a temporary component, while new factory is generated.
This factory will call all activators consequently and once it gets True - requests dependency from corresponding factory.

Rules to detect is it dynamic or not:

• async functions are always dynamic
• sync function with no arguments is static
• sync function which requests objects available in Root context is static
• sync function which requests Object which is not registered in graph is static
• sync function dependent on result of other static activators is static
• all other functions are dynamic

Currently, only dynamic calculation is implemented.
Note, that Has() can be evaluated statically only in some cases, though the implementation is generic.

[fadedDexofan]

I plan to take on this task after #645