Started work on adding the tabbed interface plugin for v4.0
added demo file
Added a basic sketch of how the tabbed interface plugin is going to make use of the carousel plugin classes and events.
Changed wet-boew- prefixes to wb-.
Small fix for carousel plugin. Prv click wasn't working.
Got the tabbed interface plugin working, using carousel to do the
cycling. Renamed class to wb-tabs from wb-tabbedinterface.
Added tabs.scss to base.scss to be included in build. Using SASS now
(started with v3.x .scss file as base).
merged conflict in base.scss
rebased
Merge branch 'v4.0' of https://github.com/wet-boew/wet-boew.git into
v4.0

Conflicts:
	src/base/base.scss

Change-Id: I248213a44ac7a7bda5266613fdcd8223dcbd2068
Merged wet-boew/v4.0 to schindld/v4.0.
Merge pull request #3347 from schindld/v4.0

V4.0 - plugin work - tabbed interface and carousel - take 2