Password Settings not Supported #79

[hugosenari]

Add back UserNamePassword
Fix #79

[bluss]

keyring seems to have changed so that it doesn't have an unencrypted fallback. That's a good thing.

[khurshid-alam]

@hugosenari How can a plugin developer use this so a user can input password in kupfer plugin settings? Can you please explain?

[hugosenari]

@khurshid-alam this is a version 2 feature, I just added old code back.
For user is a 'login' button at plugin config.
From plugin add something like this:

__kupfer_settings__ = PluginSettings( 
    {
        "key" : "login",
        "label": "Login",
        "type": UserNamePassword,
        "value": None
})

# and use it:
jira_login = __kupfer_settings__['login'] 
jira_login.username
jira_login.password

[khurshid-alam]

@bluss I tested and it works. Could you please merge this? This is important for plugin developers. Thanks.