Easier trick navigation

This release adds the following improvements:

Extract view trick throttle to seperate filter class
The view trick throttle filter is responsible for incrementing the trick view count. It does this by adding a delay to the trick view, so that revisiting a trick shortly after viewing it doesn't increment the view counter again.

Extract increment view count event to seperate event class
This class handles the actual incrementing of the trick view count.

Add 'Previous Trick' and 'Next Trick' buttons to the single trick view
This allows for navigation to the next and previous tricks, so that you can easily walk through them without returning to the browse page. Thanks to @chadwithuhc for the suggestion!

Various bug fixes and improvements