Clean up project

loadlist() will now return a dictionary of the word list when
successfully loaded and None on failure. The unnecessary main
script was removed and core.py took it's place. Wording was
further changed from "password" to "passphrase."

setup.py

@@ -1,4 +1,4 @@
-#    Dicekey. A Diceware password generator.
+#    Dicekey. A Diceware passphrase generator.
 #    Copyright (C) 2016  Kris Lamoureux
 #
 #    This program is free software: you can redistribute it and/or modify
@@ -17,11 +17,11 @@
 from distutils.core import setup
 
 NAME = "Dicekey"
-VERSION = "2.0.0-prealpha"
+VERSION = "3.0.0-prealpha"
 AUTHOR = "Kris Lamoureux"
 AUTHOR_EMAIL = "KrisPublicEmail@gmail.com"
 URL = "https://github.com/Kris619/Dicekey/"
-DESCRIPTION = "A Diceware password generator"
+DESCRIPTION = "A Diceware passphrase generator"
 
 setup(
     name=NAME,
@@ -32,6 +32,6 @@ setup(
     license="GNU GPLv3",
     url=URL,
     scripts = ["dicekey/dicekey"],
-    py_modules = ["dicekey.core", "dicekey.diceware"],
+    py_modules = ["dicekey.diceware"],
     data_files = [("dicekey/wordlist.asc", '')]
     )