Confu

Fixed
- `apply_defaults` now properly works with nested items

Added
- `File` attribute
- `Email` attribute
- `Url` attribute
- `IpAddress` attribute
- `Schema` attribute now has an optional `item` argument that if set allows for validation of dicts with arbitrary keys.
- Support for ConfigParser instances in validate
Changed
- schema moved to directory so it's easier to group and add new attributes going forward, imports remain unaffected.
- `validate` will now pass **kwargs on to `Schema.validate`
- Facsimile to Ctl

Added
- `ProxySchema`
- `apply_defaults` to apply schema defaults to a config dict
- `Config` object
Fixed
- `Schema.walk` now triggers the callback before entering subschemas
Changed
- Schema now extends Attribute and is now working on instances rather than classmethod based
- Attribute name is now optional when attribute is member of list
- renamed `ListAttribute` to `List`
- renamed `StringAttribute` to `Str`
- renamed `IntAttribute` to `Int`
- renamed `FloatAttribute` to `Float`
- renamed `BooleanAttribute` to `Bool`
- renamed `DirectoryAttribute` to `Directory`

Added
- py2.7 support
- DirectoryAttribute
- generator.generate shortcut
Fixed
- validation: schema validation returning None value
- validation: warnings raised with the wrong exception type
- exceptions: can now have integers in config path (from list index for example)
Changed
- renamed `UnicodeAttribute` to `StringAttribute` that is now looking for either string or unicode types during validation