Update contributing.md code style guide links from old to new wiki. (s…

…peeduino#389)

* Update contributing.md code style guide links from old to new wiki.

* Remove /en from new wiki link.

contributing.md

@@ -6,31 +6,31 @@ If you haven't already, jump onto our Slack team as that is where most of the de
 
 Here are some important resources:
 
-  * [Coding style guide](http://speeduino.com/wiki/index.php/Style_code)
+  * [Coding style guide](https://wiki.speeduino.com/dev/Style_code)
   * [Project forum](https://speeduino.com/forum)
   * [Slack team](https://speeduino.com/forum/app.php/page/slack)
 
 ## Testing
 
-All contributions should be in a working, compilable state. If your change does not compile cleanly it will be rejected immediately. 
+All contributions should be in a working, compilable state. If your change does not compile cleanly it will be rejected immediately.
 
 ## Submitting changes
 
-Please send a [GitHub Pull Request to Speeduino](https://github.com/noisymime/speeduino/pull/new/master) with a clear list of what you've done (read more about [pull requests](http://help.github.com/pull-requests/)). 
+Please send a [GitHub Pull Request to Speeduino](https://github.com/noisymime/speeduino/pull/new/master) with a clear list of what you've done (read more about [pull requests](http://help.github.com/pull-requests/)).
 
 Please try to make each pull request atomic, that is, there should be a single defined intent or feature for the pull request. If you are adding multiple features or fixing different bugs, please split these up and submit multiple pull requests.
 
 Always write a clear log message for your commits. One-line messages are fine for small changes, but bigger changes should look like this:
 
     $ git commit -m "A brief summary of the commit
-    > 
+    >
     > A paragraph describing what changed and its impact."
-    
+
 ## Contributor Licensing
 
 Note that all contributions to the project are made under the Github Contributor Lincensing Agreement: https://cla.github.com/agreement
 This ensures that all contributions made to the project are licensed in the same way as the existing work. Such an agreement is not intended to deprive contributors of their copyright, but to protect the project from claims by malicious contributors.
 
 ## Coding conventions
 
-The coding style guide can be found on the project wiki: http://speeduino.com/wiki/index.php/Style_code
+The coding style guide can be found on the project wiki: https://wiki.speeduino.com/dev/Style_code