version advance, schema changes, style changes, terms and privacy policy, added installer script

migrations/0_7to0_8.py

@@ -0,0 +1,23 @@
+from playhouse.migrate import migrate, SqliteMigrator, MySQLMigrator
+from peewee import MySQLDatabase, SqliteDatabase, \
+    IntegerField, DateTimeField, ForeignKeyField, DeferredForeignKey, BitField
+from app import database, UserGroup, UserGroupMembership, PagePermission
+
+
+if type(database) == MySQLDatabase:
+    migrator = MySQLMigrator(database)
+elif type(database) == SqliteDatabase:
+    migrator = SqliteMigrator(database)
+else:
+    print("Unsupported database")
+    exit()
+
+with database.atomic():
+    database.create_tables([UserGroup, UserGroupMembership, PagePermission])
+    migrate(
+        migrator.add_column('user', 'restrictions', BitField())
+    )
+    UserGroup.create(
+        name='default',
+        permissions=31
+    )