Minor fixes and minor version bump.

- More reliable clean up of stray temporary files.
- Typos in spell description.
- Separate file for version number.

dungeonsheets/spells.py

@@ -1247,17 +1247,17 @@ class Blur(Spell):
 
 
 class BurningHands(Spell):
-    """As you hold your hands with lhumbs touching and fingers spread, a
+    """As you hold your hands with thumbs touching and fingers spread, a
     thin sheet of flames shoots forth from your outstretched
     fingertips. Each creature in a 15-foot cone must make a Dexterity
     saving throw. A creature takes 3d6 fire damage on a failed save,
     or half as much damage on a successful one.
     
-    The fire ignites any flammable objecls in lhe area that aren't
+    The fire ignites any flammable objects in the area that aren't
     being worn or carried.
     
-    **At Higher Levels.** When you cast lhis spell using a spell slot
-    of 2nd level or higher, lhe damage increases by 1d6 for each slot
+    **At Higher Levels.** When you cast this spell using a spell slot
+    of 2nd level or higher, the damage increases by 1d6 for each slot
     level above 1st.
     
     """