Move identityset into api package

Makes sense since this is an API library tool.

Author: boriel

identityset.py api/identityset.pyidentityset.py renamed to api/identityset.py

@@ -4,7 +4,7 @@
 import api.utils
 
 from api.debug import __DEBUG__
-from identityset import IdentitySet
+from api.identityset import IdentitySet
 from .memcell import MemCell
 from .labelinfo import LabelInfo
 from .helpers import ALL_REGS, END_PROGRAM_LABEL

arch/zx48k/optimizer/basicblock.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from identityset import IdentitySet
+from api.identityset import IdentitySet
 from . import common
 from . import errors