Drop "keyring" requirement

Ref #418

EDMC.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python2
 #
 # Command-line interface. Requires prior setup through the GUI.
 #

EDMarketConnector.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python2
 # -*- coding: utf-8 -*-
 
 import sys
@@ -6,7 +6,6 @@ from sys import platform
 from collections import OrderedDict
 from functools import partial
 import json
-import keyring
 from os import chdir, environ
 from os.path import dirname, expanduser, isdir, join
 import re
@@ -302,9 +301,6 @@ class AppWindow:
 
         self.postprefs(False)	# Companion login happens in callback from monitor
 
-        if keyring.get_keyring().priority < 1:
-            self.status['text'] = 'Warning: Storing passwords as text'	# Shouldn't happen unless no secure storage on Linux
-
     # callback after the Preferences dialog is applied
     def postprefs(self, dologin=True):
         self.prefsdialog = None

README.md

@@ -236,17 +236,17 @@ Download and extract the [latest source code](https://github.com/Marginal/EDMark
 
 Mac:
 
-* Requires the Python “keyring”, “requests” and “watchdog” modules, plus an up-to-date “py2app” module if you also want to package the app - install these with `easy_install -U keyring requests watchdog py2app` .
+* Requires the Python “requests” and “watchdog” modules, plus an up-to-date “py2app” module if you also want to package the app - install these with `easy_install -U requests watchdog py2app` .
 * Run with `CLIENT_ID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX python ./EDMarketConnector.py` .
 
 Windows:
 
-* Requires Python2.7 and the Python “keyring”, “requests” and “watchdog” modules, plus “py2exe” 0.6 if you also want to package the app.
+* Requires Python2.7 and the Python “requests” and “watchdog” modules, plus “py2exe” 0.6 if you also want to package the app.
 * Run with `set CLIENT_ID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX && EDMarketConnector.py` .
 
 Linux:
 
-* Requires the Python “imaging-tk”, “iniparse”, “keyring” and “requests” modules. On Debian-based systems install these with `sudo apt-get install python-imaging-tk python-iniparse python-keyring python-requests` .
+* Requires the Python “imaging-tk”, “iniparse”, and “requests” modules. On Debian-based systems install these with `sudo apt-get install python-imaging-tk python-iniparse python-requests` .
 * Run with `CLIENT_ID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX ./EDMarketConnector.py` .
 
 Command-line

config.py

@@ -1,4 +1,3 @@
-import keyring
 import numbers
 import sys
 from os import getenv, makedirs, mkdir, pardir
@@ -360,13 +359,22 @@ class Config:
     # Common
 
     def get_password(self, account):
-        return keyring.get_password(self.identifier, account)
+        try:
+            import keyring
+            return keyring.get_password(self.identifier, account)
+        except ImportException:
+            return None
 
     def set_password(self, account, password):
-        keyring.set_password(self.identifier, account, password)
+        try:
+            import keyring
+            keyring.set_password(self.identifier, account, password)
+        except ImportException:
+            pass
 
     def delete_password(self, account):
         try:
+            import keyring
             keyring.delete_password(self.identifier, account)
         except:
             pass	# don't care - silently fail