Merge pull request #1268 from gjn/dev_sitemap_access

Adapt regexp to match sitemaps
Add time enabled parameter
Merge pull request #1269 from geoadmin/gal_search_time

Add time enabled parameter
Enable time button
Not displaying dummy timestamp for lubis layers.

For LUBIS layer we use a 'dummy' timestamp to display all available
year. As this timestamp has not real meaning, it must not be displayed.
Adapt tooltips for LUBIS layer.

WMTS layer with timestamp well above the current year have a special
meaning and should not be queried as it were normal timestamp.
Merge pull request #1271 from geoadmin/lubis_demo

Lubis branch