Lizard-map

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- Bugfix in statistics: the average over the rows doesn't crash anymore if
there are empty values.

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- Fixed bug in statistics export when there wasn't a percentile value set.

- Small values in the statistics display don't end up as ``0.00`` anymore, but
as, for instance, ``1.02e-03``.

- Using custom template tag 'map_variables' to get map settings in
your client. The settings are set in settings.py.

- Added option to set DEFAULT_START_DAYS and DEFAULT_END_DAYS in settings.

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- Fixed bug where graph edit form would fail always unless you switched on
summaries per *month*.

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- Added option: allow_custom_legend in adapter.

- Added optional transparency slider.

- Fixed bug in graph edit and graph line edit popup forms.

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- Fixed IE bug that most workspace-related icons floated one line down.

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- Fixed bug in filter-on-month handling.

- Using newer lizard-ui with better print icon handling.

- Using color widget for legend customization.