Add parameters to exercise placeholder

[AllanNozomu]

Solves issues (539 - 547)

• allergies
• alphametics
• anagram
• atbase-cipher
• beer-song
• binary
• binary-search
• bob
• book-store

I think the bracket-push don't need a parameter, since the name string is good for this case.

I renamed the parameter to the names used in example.py

[ilya-khadykin]

Hi, @AllanNozomu. I'm glad to see your PR.

Please note, as I mentioned in #631 (comment), I've intentionally created a separate issue for each exercise for the following reasons:

1. to encourage new contributions and promote Exercism during Hacktoberfest
2. having a separate issue for each exercise makes it easier to review them and discuss changes
3. it's relatively easier to track the progress that way in Function in templates should have parameters? #509

It was tempting to solve all the issues in one PR, but it's hard to review it. I hope you'll understand the decision.

[AllanNozomu]

Sorry, about that, I will close this PR

[ilya-khadykin]

@AllanNozomu no worries and thanks for your understanding 😄