Add searching by multiple tags

[ptrcnull]

Note: this code was a quick and dirty hack

Partially closes #304

[winkidney]

Thanks for your PR, it's very awesome.
Would you like to intergrete the filter into Pinry the way in following URL?
I'd prefer the filter occurs in our DRF document automatically : )

ref: https://django-filter.readthedocs.io/en/stable/ref/filters.html?highlight=OrderingFilter#baseinfilter

[corentiny1]

The feature will be integrated ? It will be axesome and very usefull !