Restish

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* Really include all source files in dist - paster template app was missing.

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* Include all source files in dist.

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* Fix handling of Accept header with param separator but no actual param.
* A Content-Type header is no longer automatically set for 204 & 304 responses.
* Improved error responses:
* "400 Bad Request" if the URL cannot be parsed.
* "415 Unsupported Media Type" after failing to match on content type.
* Added URL aliases for common ops: q->replace_query, rmq->remove_query.
* Added response helpers for "204 No Content" and "415 Unsupported Media Type".
* Removed decorator dependency.
* Various docstring fixes and improvements.
* Disabled django template support tests (for now).

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* Updated CHANGELOG for 0.12.x release.

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* Bad 'Accept' headers are now sanitized.
* Default HEAD implementation now forwards to a returned resource.
* 'Accept' match order fixed for latest mimeparse (mimeparse >= 0.1.13 now
required).
* Improved tests and coverage.

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* Raise useful error message when templating has not been configured.
* Support additonal headers in restish.http redirect funcs.
* Improved paster-generated projects.
* Remove setuptools dependency for those that prefer distribute.