API consistency

[fabiulous]

For consistency, I advise to add _ to every attribute.
Currently there is:

{
    "career opportunity": "75.0",
    "company_id": 55,
    "company_name": "Altran Portugal",
    "interview difficult": 45.99999999999999,
    "management quality": "37.5",
    "recognition and reward": "37.5",
    "salary": "37.5",
    "url": "https://pt.teamlyzer.com/companies/altran-portugal",
    "work life balance": "62.5"
}

Some with and some without underscore

[fabiulous]

Also, some values come as string and others as float