Use githubs api instead of scraping

Hopefully this will address issue #1.

I initially tried to get this working with minimal changes, using the link provided in the issue. The new search page places the creation date of the projects in an HTML5 element, and CHTML ignores HTML5 elements. While I was looking for a solution for that I found out that github search has an API. This patch takes advantage of the API instead of scraping with CHTML. 

Calling MAIN now creates the feed file for projects created the on same day or on the previous day.