Second Elections PR

[EarthenSky]

For #25

Finalize elections backend. Support self-registration & return speeches from GET elections/by_name/{slug} endpoint

TODOs:

• test every endpoint at least once
• add more examples to the test db

[EarthenSky]

@gunmack I've added 7 more API endpoints, which handle uploading personal info & registering in elections. This should be everything we need for the elections pages!

It now also returns speeches and personal info for a person. There are a reasonable number of special cases, but the important ones are as follows:

• you can only register, or modify/delete your registration for an election during the nomination period
• registration will be rejected if you have not first provided nominee info. This means that, after logging into the website through SFU's authentication, a user will have to provide their legal name in order to register (if they have not already done so).

You may want to read the code in this PR to see what format the data will be returned as, but I can help clarify as well, so feel free to ask me any questions!