Merge pull request #79 from AdrienGiboire/master

Article: Polygrammers: First Dreenkup in Paris
fix: ruby updated to 2.0
refactor: simplified the structure
content: rephrased description
blog: metrics of great companies
Merge pull request #80 from zaiste/blog/metrics

Blog Post: Metrics of great companies
rephrased, removed mistakes
mistakes
fix: do not display draft articles