Lizard-map

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- Added the date range popup widget from krw-waternet here. (Still
session-based. It also doesn't work with multiple workspaces yet.

- Changed layer_method and other setuptools registered functions to an
adapter class.

- Added fully functioning collages/snippets support.

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- Added early support for collages/snippets.

- Switched the custom attributes over to "data-xxxxx" attributes (those are
valid html5).

- Added generic draggability of .workspace-acceptable items.

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- Collected the rijksdriehoek and google mercator proj4 strings in one
location (coordinates.py). Including handy conversion methods.

- Added views for showing and managing workspaces.

- Added workspaces and workspaceitems for showing map layers and de-coupling
them with behind-the-scenes data.

- Added generic WMS view.

- Added shapefile layer rendering function.

- Added generic layer rendering and layer searching hook-ups through
so-called setuptools entrypoints.

- Added template tags for rendering workspaces.

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- Reordered templates a bit between lizard-ui and us.

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- Really added analysis.html

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- Moved analysis.html from krw-waternet to lizard-map
- Initial library skeleton created by nensskel. Jack Ha