Update CONTRIBUTING.md

CONTRIBUTING.md

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- To get started, <a href="http://www.clahub.com/agreements/kandanapp/kandan"> please sign the Contributor License Agreement</a>.
+### Get Involved
+Since Kandan is a fully open-source app, we would appreciate if you dive in and start adding features, fixing bugs 
+(what bugs?), and cleaning up the code.
+
+But before you jump right in there there are a few caveats.
+
+If you’re going to contribute code then you’re going to have to sign our [Contributor License Agreement](http://www.clahub.com/agreements/kandanapp/kandan) 
+(hereafter referred to as CLA) which is modeled after the one that [NodeJS](http://nodejs.org) uses.
+
+A CLA is a legal document in which you state you are entitled to contribute the code/documentation/translation 
+to the project you’re contributing to and are willing to have it used in distributions and derivative works. This 
+means that should there be any kind of legal issue in the future as to the origins and ownership of any particular 
+piece of code, then that project has the necessary forms on file from the contributor(s) saying they were permitted 
+to make this contribution.
+
+The CLA also ensures that once you have provided a contribution, you cannot try to withdraw permission for its use at 
+a later date. People and companies can therefore use that software, confident that they will not be asked to stop 
+using pieces of the code at a later date.
+
+You will also really want to take heart and read these two blog posts.
+
+* [How to Contribute Code](https://github.com/kandanapp/kandan/wiki/How-to-Contribute-Code)
+* [How to Contribute Issues](https://github.com/kandanapp/kandan/wiki/How-to-Contribute-Issues)
+