Fix anchor links to os-specific install instructions

The anchor links in the current version of the NewToNode page (rendered in the [#getStarted](http://sailsjs.org/#/getStarted) page on the actual website) do not work: they redirect users to the project home page. 

##### Steps to reproduce: 
* Visit [http://sailsjs.org/#/getStarted](http://sailsjs.org/#/getStarted)
* Click on "I have Linux"  (any of the three OS links will do, they all behave the same)
* Get unexpectedly redirected to the project home page.

This patch fixes things by renaming the `name` attribute of the three anchors to correspond to the format apparently in use by whatever compiles this code: `/getStarted?q=<something>`.