Removed RepFilters - they were defined but never used.

Removed RepFilters - they were defined but never used.
Moved profession_table out of the do block that contained it and InitializeRecipes(), and moved its initialization from that function to addon:OnInitialize() since there was no need to re-define its keys/values, and renamed it to PROFESSION_INITS.
Renamed InitializeRecipes() to InitializeRecipe() since that is exactly what it does, and re-worked its code. It also no longer resides within a do block.
Changed addon:AddRecipeData() to no longer check for the existence of RecipeList (it will always exist) and simply return InitializeRecipe() - so now it is merely a wrapper function (wondering if there is actually a reason it should exist)
In addon:GetExclusions(): Re-worked to minimize table lookups and removed the RecipeDB parameter since it always uses RecipeList.