Increase the number of projects per page returned by /recent.json endpoint 

The `/recent.json` endpoint  currently returns 25 projects per page, and if a `bot` need to fetch all submitted projects it should make lots of API requests witch is relatively inefficient, so I'd suggest to increase the number of projects returned in a single response to at least 100, and maybe it would make sense to allow the `page_size` to be passed as parameter.       