Update sucker_punch to 0.4
Send subscription object to SubscriptionMailer instead of only the subscriber

- Also, fix 'size' on unicorn.rb due to sucker punch update.
- Check if there is an invite code for the given subscriber
- Just it.
Fix first_name method on user decorator to check only words

Instead of splitting like a crazy guy.
Validates length of name, but based on WORDS.

- It's mandatory to fill your first name and last name.
- Minimum of 2 words.
Remove one previous supporter.
Increase database pool time.
Include the right library to run workers tests

- But still failing due to ActionMailer.
- Change all async workers to sync ones
- Add Invite blueprint.
Add test case for user names.

To make sure the model is validation more than 1 word for user names'.