Merge pull request #413 from albhasan/update_contributing #57

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[needs HTTPS]: [http://software-carpentry.org/](http://software-carpentry.org/)

[needs HTTPS]: [Community Initiatives](http://communityin.org/)

[needs HTTPS]: [Introduction to R for Geospatial Data](http://www.datacarpentry.org/r-intro-geospatial/)

[needs HTTPS]: [Introduction to Geospatial Concepts](http://www.datacarpentry.org/organization-geospatial/)

[needs HTTPS]: [Geospatial Workshop Overview](http://www.datacarpentry.org/geospatial-workshop/setup.html)

[needs HTTPS]: [Geocomputation with R](http://robinlovelace.net/geocompr/)

[needs HTTPS]: [Data Carpentry Geospatial workshop](http://www.datacarpentry.org/geospatial-workshop/)