ResourceInjector was not respecting custom bootstrap css files. Fixed by

removing <stylesheet>s and adding injectCss calls to configure().

Custom css files can live anywhere now, including in a Maven
src/main/resources tree (instead of the src/main/java tree).
Updated Configurator documentation to illustrate.

Carlos, your blog post at http://carlosbecker.com/posts/using-a-custom-bootstrap-theme-in-gwt-bootstrap/  is currently not working at all. This fixes it. There is also no need for a forced directory structure (css files should not live in /src/main/java) so I documented that as well.