List Pagination and Search
Two main enchancements in Post Collection API
GET /posts returns List of Posts with pagination support. Parameters: page [1..N] and size [1..M]. Default values are '1' for page and '10' for size.
GET /posts/search Accepts 'q' query parameter with search string. Up to 100 symbols.
Refactor:
cryptogen renamed to certgen to give it proper meaning.