Links to documentation from download page

@tomgreever What do you think about adding a link to the docs for each module in the [ download builder](http://canjs.com/download.html).

We probably don't want the link on the text of the module itself because that would interfere with the checkbox selection, but perhaps something to the right of the name (icon or the text docs)?

From CanJS issue [930](https://github.com/bitovi/canjs/issues/930).
CC: @marshallswain

Start at the download builder on download.html and inspect how module names and checkbox selection are rendered. Add a separate documentation link for each module without making the module text interfere with selection; done means every module has a usable docs link and checkbox behavior remains intact.

Written by the indexing model from the issue text.