Update README.md

Author: LucFF

README.md

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 Reusable Pine Script snippets and tricks & tips to help Pine Script developers.
 
 Our [web site](http://pinecoders.com) contains links to our [Coding Conventions](http://www.pinecoders.com/coding_conventions/), [Pine FAQ & Code](http://www.pinecoders.com/faq_and_code/) and [Pine Resources](http://www.pinecoders.com/resources/).
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+[Interested in contributing?](/snippets/#instructions-to-contributors)