Renamed excanvas.js license to make it more explicit which file it applies to.
Added link to original code for jquery.tagcloud.js plugin and license.
Tweaked sizing of tags in flat cloud.
Make TagCloudTag work with jnt:query bound components: we needed to render the hidden.load view on it (if it exists) in order for elements to be loaded.
Note that this change requires a change made in OptionTag to extract its logic in a static method so that it can be reused here.