Plone.tiles

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- Fix issue where collective.cover was broken, because internal changes in
default data managers
[datakurre]

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New features:

- Option to customize storage layer with ITileDataStorage adapter
[datakurre]

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Bug fixes:

- Reformat docs.
[gforcada]

- Add coveralls shield.
[gforcada]

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- Let TileType instances (tile registration utility) know about the view
permission too.
[jensens]

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- Fix issue where ESI href was not properly replaced.
[jensens]

- Add section "ZCML Reference" to README.rst.
[jensens]

- PEP8, code-analysis, documentation and packaging fixes.
[jensens, mauritsvanrees]

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- Fix decoding List type of Choice value types
[vangheem]