Buttons can be turned on/off per view and setting.

Lizard needs to be easier to use so we can disable buttons now and
fixed some pep8,
added tests,
moved some tests to test_appview.py.
Fixed typo. Thanks to @reinout for spotting it.
Merge pull request #25 from lizardsystem/roland-friendly

Buttons can be turned on/off per view and setting.
Added a transparent icon
Merge branch 'master' of github.com:lizardsystem/lizard-map
Integration with the nens layerswitcher.

The nens layer switcher is used for switching between
layers with nice ui elements integrated with Lizard.
Used Dutch strings for 'now'. Knock on wood.
Removed text from icons and use better icons.
Removed an empty event.
Removed popover css class because the tooltip didn't work out.
Merge pull request #26 from lizardsystem/roland-friendly2

Pull request for iPad friendly version
Added changelog information for ipad friendly changes.
Update transla
Add Chinese.
Preparing release 4.28
Back to development: 4.29
Merge branch 'master' into jack-anim

Conflicts:
	lizard_map/static/lizard_map/animations.js