Implement REST API for Google Scholar wrapper

[Xiphereal]

Implement a REST API for the Google Scholar wrapper that allows for year-filtered requests to the data source.

Note that this REST API must be in the GoogleScholarWrapper module, integrated alongside #15. The reason of not creating a single issue for the whole wrapper and splitting the contents in two, is because the data extraction is performed with Selenium and it seems to be a tiresome and hard work just on its own.

The returned response must be in JSON format (transformed from BibTex), only containing results in the requested year range.