settings update

src/settings.py

@@ -1,22 +1,29 @@
-import getpass
 import platform
 import json
+import os
 
 
 class Settings(object):
 
     def __init__(self):
-        path = Settings.get_default_path() + 'toxygen.json'
-        with open(path) as fl:
+        self.path = Settings.get_default_path() + 'toxygen.json'
+        with open(self.path) as fl:
             data = fl.read()
         self.data = json.loads(data)
 
     def __get__(self, attr):
         return self.data[attr]
 
+    def save(self):
+        text = json.dumps(self.data)
+        with open(self.path, 'w') as fl:
+            fl.write(text)
+
     @staticmethod
     def get_default_path():
         name = platform.system()
         if name == 'Linux':
-            user = getpass.getuser()
-            return '/home/{}/.config/tox/'.format(user)
+            return os.getenv('HOME') + '/.config/tox/'
+        elif name == 'Windows':
+            return os.getenv('APPDATA') + '/Tox/'
+