[startunicorn] Extract methods from loop

[felipmartins]

Doing this we're solving two noticed bugs;

• Preventing the ask_for_star message from spamming;
• Fixing the folder creation for nested components[1];

[1] I've noticed that creating two nested components in a row python3 manage.py startunicorn app test_1.test_2.table test_3.test_4.row goes wrong beacuse of component_base_path variable.

I also needed to add the creation os app/templates/unicorn to test file.

Hope it helps! :)

[adamghill]

Thank you! I'll merge this in for the next release. 👍