Lizard-ui

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- Date range styling; fix a FOUC; fix cursur pointer on H2;

- Increased right sidebar to make legends fit.

- Added styling for multi-select button.

- Proper submission and handling of global errors on login form.

- Changed label of collapse-sidebar-button to 'Navigatie'.

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- Moved excanvas for IE 6 and 7 outside compress.

- Fixed trailing commas (IE7 does not like them).

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- Replace zettingen.png icon to one with shadow.

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- Added ``required_permission`` attribute on UiView. If you set it, the
permission is checked and the user redirected, if needed.

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- Tiny styling fix.

- Add flot bar graph support.

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- Properly close secondary sidebar ("Kaartlagen") when hiding the sidebar ("Inklappen").

- Add the Flot JavaScript library.

- Fix a small styling issue concerning workspaces.

- Update to jQuery 1.7.2 which includes some .ajax() fixes.

- Add client side support for the new FlotGraph.