v0.3.0: buff descriptions round 5, all descriptions added

src/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Venom.java

@@ -32,6 +32,7 @@ public class Venom extends Poison implements Hero.Doom {
     }
 
     @Override
+    //TODO: new icon?
     public int icon() {
         return BuffIndicator.POISON;
     }
@@ -41,6 +42,15 @@ public class Venom extends Poison implements Hero.Doom {
         return "Venomed";
     }
 
+    @Override
+    public String desc() {
+        return "Venom is a extremely caustic and dangerous poison.\n" +
+                "\n" +
+                "Unlike poison, whose damage lowers over time, venom does increasing damage the longer it stays on a target.\n" +
+                "\n" +
+                "This venom will last for " + dispTurns(left) + ", and is currently dealing " + damage + " damage.";
+    }
+
     @Override
     public boolean act() {
         if (target.isAlive()) {