Command to import a component inside another

[tanohzana]

Describe the solution you'd like
I think it can be interesting to add a command that allows importing a component inside another.
For instance, if you are building a house component and you need to import a door component, you'd type:

reacli import door in house

In order to do that, we could use the .reacli file to store a dictionnary mapping components and paths.

Depends on #13

[anatol-grabowski]

I dont think this is a useful feature that worth the effort. As a user I would prefer to type a single import line into the file directly by myself instead of trying to remember one extra command and spend the same amount of time typing it.