Player

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- Added python 2.6

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- Allow to use standard renderers in `render` function

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- Use jinja2 for templates

- Added `layout_data` request property

- Allow to pass several messages to `error` message

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- Added `player.layout` renderer

- Added `-c` argument to `player` console script,
it allows to customize templates

- `set_layout_data` accepts keyword arguments

- Removed `player.wrap_layout()`

- Removed python2.6 support

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- Added `set_layout_data` request method, allow to set global layout options

- Added status messages

- Added formatters

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- Added `layout` subsystem