Severino should take screenshots with Selenium

[knorrium]

Given a list of pages, Severino should iterate through all these pages and take screenshots of them.

Extra: Support multiple browsers

[knorrium]

My initial idea for a config.json file:

{
    "pages": {
        "yahoo": {
            "url": "http://www.yahoo.com",
            "filename": "yahoo.png"
        },
        "google": {
            "url": "http://www.google.com",
            "filename": "google.png"
        },
        "terra": {
            "url": "http://www.terra.com.br",
            "filename": "terra.png"
        },
        "facebook": {
            "url": "http://www.facebook.com",
            "filename": "facebook.png"
        }
    },
    "selenium": {
        "server": "http://localhost:4444/wd/hub",
        "browsers": [
            "chrome",
            "firefox"
        ]
    }
}

[bigodines]

I had a different idea:

We could create a new pyccuracy statement (or create a custom selenium action) such as:
"And I take a screenshot for rev: abc3432" (or this could be a datatime)

then severino places this file under abc3432/{page_title}.png

and we could verify by running:
Severino.compare({rev a}, {rev b})

in the future, we would have a different directory tree for each browser.