Collective.pece

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- Fix content type titles: Asthma Annotation, Asthma Response

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- Rename ``annotation`` -> ``asthma_annotation``
- Rename ``response`` -> ``asthma_response``
- Add richtext field to response, fixes 1
- Reorder artifact content type fields
- Rename artifact primary fields to ``file_``
- Add ``artifact-view`` to display menu

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- Fix package error

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- Rename reserved word "dublin_core-named" fields from ``dublin_core_<fieldname>`` to ``<fieldname>_``
- Rename package: ``rpi.asthma_files_site`` -> ``collective.pece``
- Remove logo customization, part II: template-overrides directory removed
- Rename ``question`` content type id -> ``asthma_question``
- Add tests
- Add more documentation
- Add preliminary Zotero integration
- Add collective.documentviewer integration

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- Add more documentation
- Change title/id generation on all artifacts to use INameFromFileName behavior

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- Remove new-style (Diazo) theme