Merge pull request #90 from isvaldo/patch-1

Added link to save R files online in curated.md

Author: seankross

curated.md

@@ -40,6 +40,7 @@ permalink: /curated/
 - [data.table cheat sheet](https://s3.amazonaws.com/assets.datacamp.com/img/blog/data+table+cheat+sheet.pdf)
 - [Exploratory Data Analysis with data.table](http://varianceexplained.org/RData/lessons/lesson4/)
 - [Fast summary statistics in R with data.table](http://blog.yhathq.com/posts/fast-summary-statistics-with-data-dot-table.html)
+- [R online in r-fiddle.org](http://www.r-fiddle.org/)
 
 ### Probability and Statistics