Dynmap integration
 - markers for spawn points (optionnal)
 - markers for death points (optionnal)

Please note: currently the integration does not works with CraftBukkit or Spigot 1.7.9 and dynmap 1.9.2 - 2.0.0.
I don't know why, if the problem is from me or from dynmap. This is why the integration is disabled by default.

Also:
 - moved the safeTP-related method to a UHUtils class.