feat: Added readme and license information and renamed opcode_names file

pjvm/exceptions.py

@@ -1,4 +1,4 @@
-from .opcodes_names import INSTRUCTIONS
+from .opcode_names import INSTRUCTIONS
 
 
 class PJVMException(ValueError):

pjvm/vm.py

@@ -7,7 +7,7 @@ from .exceptions import *
 from .mockimpl import mock_instance_methods, mock_static_objects
 from .old_jtypes import JArray, JObj, JString
 from .opcodes import OPCODE_TYPE, Opcode
-from .opcodes_names import INSTRUCTIONS
+from .opcode_names import INSTRUCTIONS
 from .stackframe import Frame
 
 LOGGER = getLogger(__name__)