Added smoke test for featureline
Refactored big popup_info method on WMSSource.
Most of it has been moved to FeatureLine instead.
I can now more easily test it
Refactored URL rendering.

The template is refactored: just one way to render links.
The url modification (adding http:// or not) is handled in models.py now.
Added featureline 'click here' type.

The URL will be shown as 'click here for more info' link.
Useful when you have a http://ftp.somelongservername.nl/boringfolder/wef8883900/232rrfdd.html link.
Updated changelog
Using 'from lizard_wms import models'

This matches what happens in `views.py`.
Removed unused comment line
Removed backslash
Merge pull request #21 from lizardsystem/reinout-rawhtml

'more' link for featureline URL rendering