RBC crawler

Main url: https://www.rbc.ru/

Pyhon notebook (rbc_crawler.ipynb) consist of class RBCparser, which has several methods:

1. init - define main requset and soup
2. find_links - return the list of links for root link
3. find_all_links - return the list of links for root link and for all links in find_links method
4. find_text - return dictioanary with all texts for each link in input parameters
5. find_title - return dictioanary with all titles for each link in input parameters
6. find_images - return dictioanary with all images for each link in input parameters
7. save_dict - save input dict/list in json format