Fixes #376 - Expose method to override CompilerOptions inside GoogleClosureJavaScriptCompressor
Update GoogleClosureJavaScriptCompressor.java

https://github.com/l0rdn1kk0n/wicket-bootstrap/issues/376
Merge pull request #377 from subes/master

Add an option to override GoogleClosureJavaScriptCompressor compiler options
Issue #376 - Fix the build
Fixes #375 - Use yuicompressor as optional Maven dependendency
Issue #375 - Add javadoc how to use it
Issue #375 - Add javadoc to YuiCssCompressor
Merge pull request #378 from l0rdn1kk0n/375-YUI-compressor

use yui compressor maven dependency instead of copy
Fixes #379 - Add support for closeOnEscapeKey and backdrop
Fixes #380 - Use UrlResourceReference that depends on the configured JQueryResourceReference for Bootstrap's JS from CDN
Fixes #381 - Add functionality to disable the enforcement of the focus so that inner components (like Select2) can acquire the focus