Rename schema file + ignore db

.gitignore

@@ -0,0 +1 @@
+*.db

pits.py

@@ -142,7 +142,7 @@ def read_last_action():
     return last_action
 
 db_filename = 'pits.db'
-schema_filename = 'pit_schema.sql'
+schema_filename = 'pits_schema.sql'
 
 # TODO Use init command like original pit
 # TODO Need to add an action - log init