#311 Additional spell types needed -> Root and Snare(should be separated)

we will use these types, not sure we need anything in the code yet for these two (conflict/stacking should already be applicable based on stronger skill required for the spell) -- I guess that a higher level spell might not have as much of a movement speed decrease on a snare, but how often does that happen?

#define SPELL_TYPE_ROOT         15
#define SPELL_TYPE_SNARE        16