Din's Legacy patch 0.903

This patch optimizes a bunch of things (test scene ~32% faster), adds a model for the tower entrance, and fixes a bunch of smaller issues. 0.903 change list:

• now cull minimap blips better (test went from 57.7 to 65.4 fps, 13.3%)

• removed an extra height calculation in GraphicsSystem::shouldCullModel (test went from 64.3 to 67.9 fps, 5.6%)

• removed lightIndexes being a local array in renderSurface (test went from 54.3 to 56.7 fps, 4.4%)

• culled some more minimap blips better (test went from 69.2 to 71.5 fps, 3.3%)

• made getTileObject caching work better (test went from 57.8 to 58.9 fps, 1.9%)

• cache model matrix instead of just angle (test went from 78.4 to 79.8 fps, 1.8%)

• changed a couple dynamic_cast to static_cast (test went from 79.0 to 80.3 fps, 1.6%)

• no longer cull each surface separately (now per entity) (test went from 48.3 to 49.0 fps, 1.5%)

• sped up surface culling in calculateShadowMappingLightFov (test went from 70.9 to 71.8 fps, 1.3%)

• now some ResourceHandles marked as temporary and they don't go through add/remove user (test went from 78.4 to 79.4 fps, 1.3%)

• cull shadows a little better (test went from 77.2 to 78.1 fps, 1.2%)

• no longer calculate getNumberOfAchievementsForBonus except when it changes (test went from 77.0 to 77.8 fps, 1.0%)

• optimized bindTexture slightly (test went from 79.4 to 80.0 fps, 0.8%)

• cull tiles a little better now (test went from 71.4 to 71.9 fps, 0.7% - also simplifies code a bit)

• sped up getting instigatorQuestDatabaseEntry (test went from 55.4 to 55.8 fps, 0.7%)

• no longer add lights from models (old feature) (test went from 78.9 to 79.4 fps, 0.6%)

• sped up a bunch of getDatabaseEntry calls in CovenantBase (didn't test speed, too erratic)

• added tower model

• changed setUseTextureAlpha to correctly be per texture unit

• fixed a problem getting unique skills without their mutations during full mutations (hella/Procura)

• fixed Diplomacy scenario sometimes picking invalid clans (Dragonface)

• changed lvl on selected entity ui to eff lvl to show it is the effect level, not the real level of the monster (Dragonface)

• added real level and effective level numbers on effect level highlight text (Dragonface)

• fixed a contention issue in AreaResource::getTileObject

• added tag_chest to healthstone so effects target a reasonable place

• fixed missing QuestNewNpcAnnouncement translation (Dragonface)

• fixed bad wording in replacement unique quest text (Dragonface)

• changed setProgramEnvParameter4fv vector parm to const

• cleaned up LightingSystem::getLightData

• cleaned up generate2dGeometry a little (one text goes through)