Feature Description: Add multiple map filtering options when rendered on the web.

• Additional context: Currently Dynmap appears to have bilinear filtering enabled and cannot be disabled. I want an option to be able to disable or enable the filtering or have multiple options for filtering. I wanted to request this feature because I'm using a hires map and the filtering looks ugly when zoomed in. Disabling filtering entirely may also help with performance. Example pic here:
  

unrelated, fix by using boosted maps(wiki).