Issue #340 - extract Stack as a proper class.

The users have to use ProgressBar#getStackId() explicitly now
Merge pull request #361 from l0rdn1kk0n/340-progress-bars

Progress bar rework
Removed active css class for tabs
Update FormGroup to use FormComponent.getDefaultLabel() (form component
id as bundle key) when no FormComponent Label is specified. (as
FormComponent does)
Merge pull request #364 from ymlaine/master

FormGroup update to use FormComponent.getDefaultLabel() if no component label specified
Merge pull request #362 from cschroeter/master

Removed active css class for tabs
Fixes #367 - Do not contribute the CSS reference - it will be contributed by the ITheme in use.
Minor javadoc improvements
Use wicket-jquery-selectors 0.0.4-SNAPSHOT because of https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/365
https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/365 - Use utility methods Strings2.getMarkupId() and Strings2.escapeMarkupId()
Use spaces instead of tabs for consistency
Issue #364 - Fallback to the labelModel when there is no explicit default label in the i18n resources for this id
Fixes #369 - Upgrade Font Awesome to 4.1.0
Upgrade dependencies
update wicket-webjars
update wicket-jquery-selectors
prepare for release
update versions and prepare for next release
Merge branch 'master' into dependencies-upgrade
Merge pull request #370 from l0rdn1kk0n/dependencies-upgrade

Upgrade dependencies