list_or: chaniging how list_or_* functions work and adding a generic list_or

list_or_* functions (e.g. list_or_string) will now always return a list,
however will accept lists or indivitual values. Also added a list_or()
generator function, similar to what already exists for list_of().

wlauto/tests/test_utils.py

@@ -21,6 +21,7 @@ from nose.tools import raises, assert_equal  # pylint: disable=E0611
 
 from wlauto.utils.android import check_output
 from wlauto.utils.misc import merge_dicts, TimeoutError
+from wlauto.utils.types import list_or_integer, list_or_bool
 
 
 class TestCheckOutput(TestCase):
@@ -61,3 +62,11 @@ class TestMerge(TestCase):
         other = {'a': 'test'}
         merge_dicts(base, other, match_types=True)
 
+
+class TestTypes(TestCase):
+
+    def test_list_or_conversion(self):
+        assert_equal(list_or_integer([1, '2', 3]), [1, 2, 3])
+        assert_equal(list_or_integer('0xF'), [15,])
+        assert_equal(list_or_bool('False'), [False,])
+