wicket-webjars 0.3.0

• update webjars-locator
• improve locator performance
• fix glyphicons loading issue with bootstrap 3

<dependency>
  <groupId>de.agilecoders.wicket.webjars</groupId>
  <artifactId>wicket-webjars</artifactId>
  <version>0.3.0</version>
</dependency>