Config framework refactor

This new config framework makes it easier to make persistent configuration files with Pythonic access.

```python
from freeseer import settings

profile, storage = settings.setup_profile_and_storage('default', 'freeseer.conf')
config = storage.load(settings.FreeseerConfig(), 'Global')
storage.store(config, 'Global')
```

This creates a profile @ `$HOME/.freeseer/profiles/default` and creates a default config in `freeseer.conf` with the defaults of any options defined inside the FreeseerConfig class.

```python
class FreeseerConfig(Config):
    # TODO: This should probably be in a constants file somewhere
    resmap = {
        'default': '0x0',
        '240p': '320x240',
        '360p': '480x360',
        '480p': '640x480',
        '720p': '1280x720',
        '1080p': '1920x1080'
    }

    videodir = options.FolderOption('/home/mtomwing/Videos', auto_create=True)
    auto_hide = options.BooleanOption(True)
    resolution = options.ChoiceOption(resmap.keys(), 'default')
    enable_audio_recording = options.BooleanOption(True)
    enable_video_recording = options.BooleanOption(True)
    videomixer = options.StringOption('Video Passthrough')
    audiomixer = options.StringOption('Audio Passthrough')
    record_to_file = options.BooleanOption(True)
    record_to_file_plugin = options.StringOption('Ogg Output')
    record_to_stream = options.BooleanOption(False)
    record_to_stream_plugin = options.StringOption('RTMP Streaming')
    audio_feedback = options.BooleanOption(False)
    video_preview = options.BooleanOption(True)
    default_language = options.StringOption('tr_en_US.qm')
```

And the file it created:

```ini
[Global]
audio_feedback = false
audiomixer = Audio Passthrough
auto_hide = true
default_language = tr_en_US.qm
enable_audio_recording = true
enable_video_recording = true
record_to_file = true
record_to_file_plugin = Ogg Output
record_to_stream = false
record_to_stream_plugin = RTMP Streaming
resolution = default
video_preview = true
videodir = /home/mtomwing/Videos
videomixer = Video Passthrough
```