[refactor] Rename method

The old name was a bit more explicit but way too verbose.
[refactor] Rename variables
[refactor] Minor formatting tweaks
[refactor] Update comment
[refactor] Improve `getStatus()` method

The method now returns the result of the `each()` loop instead of using a temporary array to store this content.

A variable is also renamed for better consistency.
[refactor] Improve retrieval of history data

Logic has been extracted from `getHistory()` and moved to a new `parseHistoryItem()` method.

The `getHistorySelector()` method has been renamed to `getHistoryCrawlers()` and now returns an array of crawlers instead of a CSS selector.

Among other minor improvements, variables have been renamed for better consistency.
Move `getHistoryCrawlers()` method
Move two methods
Detect governments as authors

When a dossier has been tabled by a government, the name of this government is now returned instead of being simply discarded. This change thus makes sure that we don’t return ‘fake’ null values anymore when a gov is the official author.