Move package manager to blender branch

Moved the package manger out of an addon. It now lives here:
https://developer.blender.org/diffusion/B/browse/soc-2017-package_manager/

This repository still contains the repo generation script, the readme
has been updated to reflect this.

tests/test_make_repo.py

@@ -5,7 +5,12 @@ from pathlib import Path
 import logging
 import ast
 import json
-import bpkg-repogen
+
+import types
+import importlib.machinery
+loader = importlib.machinery.SourceFileLoader('generate_repository', 'generate_repository')
+generate_repository = types.ModuleType(loader.name)
+loader.exec_module(generate_repository)
 
 logging.basicConfig(level=logging.ERROR,
     format='%(levelname)8s: %(message)s')
@@ -18,19 +23,11 @@ class TestRepoGeneration(unittest.TestCase):
     def test_extract_blinfo_from_nonexistent(self):
         test_file = 'file_that_doesnt_exist'
         with self.assertRaises(FileNotFoundError):
-            bpkg-repogen.extract_blinfo(self.addon_path / test_file)
+            generate_repository.extract_blinfo(self.addon_path / test_file)
 
-    def test_package_quantity(self):
-        repo = bpkg-repogen.bpkg-repogen(self.addon_path, "name of the repo")
-        acceptible_addons = [
-            f for f in self.addon_path.iterdir()
-            if not f.match('*nonaddon*')
-            ]
-        self.assertEqual(len(repo.packages), len(acceptible_addons))
-
-    def test_bpkg-repogen_from_nonexistent(self):
+    def test_generate_repository_from_nonexistent(self):
         with self.assertRaises(FileNotFoundError):
-            bpkg-repogen.bpkg-repogen(Path('in_a_galaxy_far_far_away'), "somename")
+            generate_repository.make_repo(Path('in_a_galaxy_far_far_away'), "somename", "someurl")
 
 # addons which should contain bl_infos
 yes_blinfo = [
@@ -45,7 +42,7 @@ no_blinfo = [
 
 def generate_good_blinfo_test(test_file: Path):
     def test(self):
-        reality = bpkg-repogen.extract_blinfo(test_file)
+        reality = generate_repository.extract_blinfo(test_file)
         with (self.helper_path / 'expected_blinfo').open("r") as f:
             expectation = ast.literal_eval(f.read())
         self.assertEqual(expectation, reality)
@@ -53,8 +50,8 @@ def generate_good_blinfo_test(test_file: Path):
 
 def generate_bad_blinfo_test(test_file: Path):
     def test(self):
-        with self.assertRaises(bpkg-repogen.BadAddon):
-            bpkg-repogen.extract_blinfo(test_file)
+        with self.assertRaises(generate_repository.BadAddon):
+            generate_repository.extract_blinfo(test_file)
     return test
 
 # Add test method retur