[ANALYTICS] Add tracking to comments

[josegonzalez]

[josegonzalez]

This link should be a good guide for this, if anyone is interested in working on this.

We should just make a ga event. There are examples of this in default.ctp on line 171. Probably something like:

_gaq.push(['_trackEvent', 'comment', 'package', PACKAGE-CATEGORY, PACKAGE-ID]);

This could help us identify categories that might need more attention, or popular packages.

[angelxmoreno]

easy peasy, I can take care of this.