Implement basic Pods#by_stars method. Refs #5.
Detect errors in parsing github repo info. Refs #5.
Improve github repo info parsing. Refs #5.
Cache fetching github stars count. Refs #5.
Fix Pods#by_stars spec
Add Pods#repositories method only showing up github repos. Refs #5.
Fix Pods#repositories returning all pods. Refs #5.
Add basic travis ci config. Refs #1.
Set travis to use ruby 2.0.0. Refs #1.