Better tag handling & metrics

Originally all tags were loaded by default and bandaid-ed with limit(200) queries. Tags now have a popularity metric and only load the top 5 most popular tags for each category. User has the option to load the rest by category.

Removed authentication requirements

With the approval flag and mod/admin accounts, there is no reason to restrict submissions, suggestions, and flags to authenticated users. Anyone can now do so. The login/register component has been visually deprioritized accordingly.

Initial public release

Still rough, but shippable and beyond MVP at this point.