Jcardonadcdev/issue25 add modules to nav

[russaa]

see davidshimjs#45
see davidshimjs#25

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This PR is to fix one existing issue, one issue I found while working with a recent version of jsdoc, one change to the display of items in the navigation list, and one change to display markdown lists in class descriptions as bulleted lists.

* The existing issue is #25, modules tagged with `@module` do not get added to the navigation list on the left side of the page. In reference to this issue I made the following changes:
  
  * Added a new `if` statement to the `publish.buildNav` method to add modules to the array of items that get added to the navigation list
  * Removed `module:` from the name of the navigation item so the display name shown in the list is easier to read.

* I found an issue when using the most recent version of _jsdoc_ (3.4.2) that gets bundled with the latest version of _grunt-jsdoc_ (2.1.0). The `<li>` elements generated for AMD modules in the navigation list have the wrong `data-name` attribute value due to a new file naming method in recent versions of _jsdoc_.
  
  * The fix is to set the `data-name` attribute of the element to the file name generated generated for the module instead of setting it to the `longname` property.

* I added some entries to `main.less` to render `<li>` elements in class descriptions with `list-style-type:disc`

* The last change is to add section labels to the navigation list so that it is easy to see the items grouped by type. This is the way that the default template for jsdoc displays items in the navigation list.