Add voting analytics

It would be awesome if Feature Upvote has some sort of basic analytics such as Daily Votes and potentially tracking per feature too. This way we can easily see if more people are voting and even graph out the popularity of each voted feature over time.

To help with showing the value and acceptance of the tool within the company, it would be nice to get some basic statistics, like a line chart of new suggestions, comments and vote per week for the last 12 weeks.