Provide a way to specify a non-default table name when creating TinyD…

tests/test_tinydb.py

@@ -409,3 +409,10 @@ def test_gc(tmpdir):
     table.insert({'int': 13})
     assert len(table.search(where('int') == 13)) == 1
     assert table.all() == [{'something': 'else'}, {'int': 13}]
+
+
+def test_non_default_table():
+    db = TinyDB(storage=MemoryStorage)
+    assert [TinyDB.DEFAULT_TABLE] == list(db.tables())
+    db = TinyDB(storage=MemoryStorage, default_table='non-default')
+    assert ['non-default'] == list(db.tables())

tinydb/database.py

@@ -53,6 +53,7 @@ class TinyDB(object):
     and getting tables.
     """
 
+    DEFAULT_TABLE = '_default'
     DEFAULT_STORAGE = JSONStorage
 
     def __init__(self, *args, **kwargs):
@@ -66,20 +67,23 @@ def __init__(self, *args, **kwargs):
                         with ``args`` and ``kwargs``.
         """
 
+        storage = kwargs.pop('storage', TinyDB.DEFAULT_STORAGE)
+        table = kwargs.pop('default_table', TinyDB.DEFAULT_TABLE)
+
         # Prepare the storage
         self._opened = False
 
-        storage = kwargs.pop('storage', TinyDB.DEFAULT_STORAGE)
         #: :type: Storage
         self._storage = storage(*args, **kwargs)
 
         self._opened = True
 
         # Prepare the default table
+
         self._table_cache = {}
-        self._table = self.table('_default')
+        self._table = self.table(table)
 
-    def table(self, name='_default', **options):
+    def table(self, name=DEFAULT_TABLE, **options):
         """
         Get access to a specific table.