Issue #138 - Implement CDN urls for CSS resources
Merge branch 'master' into issue138
Issue #138 Add a setting to enable loading Css resources from CDN network
Use the CDN CSS resources in the samples application
Issue #161 Simplify Less resources
Issue #161 Implement server side caching for generated CSS content out of some Less resource

The CSS content is generated if there is no such in the cache or re-generated when the .less file or any of its imports is updated.
Merge branch 'master' into issue138

Conflicts:
	bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/themes/bootstrap/BootstrapTheme.java
	bootstrap-core/src/main/java/de/agilecoders/wicket/core/settings/IBootstrapSettings.java
	bootstrap-core/src/main/java/de/agilecoders/wicket/core/settings/Theme.java
	bootstrap-samples/src/main/java/de/agilecoders/wicket/samples/WicketApplication.java
	bootstrap-themes/src/main/java/de/agilecoders/wicket/themes/markup/html/bootswatch/BootswatchTheme.java
	library/src/main/java/de/agilecoders/wicket/settings/BootstrapSettings.java
	pom.xml
Merge branch 'master' into cached-less

Conflicts:
	bootstrap-less/src/main/java/de/agilecoders/wicket/less/BootstrapLess.java
Issue #161 - Remove old classes and add a demo application uses for unit tests
Issue #161 Remove usage of obsolete classes
Merge branch 'master' into cached-less
Merge branch 'master' into issue138
use "type" parameter in BootstrapAjaxButton (fixes #164)
use "type" parameter in BootstrapAjaxButton (fixes #168)
upgrade to wicket 6.7.0 (fixes #169)
Merge remote-tracking branch 'origin/master' into rich-popover
use LDM instead of Model for RichPopoverBehavior
Merge branch 'master' into issue138

Conflicts:
	pom.xml
Issue #138 - Make it possible to configure a different version of Twitter Bootstrap
Issue #138 - Use Netdna for js resource too