Support for Static File deployment

[leggetter]

BRJS currently only supports deployments as WAR files. We need to support deployments in simple flat files for deployment to hosting such as GitHub pages or any CDN.

• create an export command for flat-file export
• create a filter so that the bundles can be referred to using their proper extension type, in preparation for flat file export
• Remove WEB-INF (create a J2eeifyCommandPlugin that allows the WEB-INF folder to be made explicit again #90 and modify the app template to no longer add 'WEB-INF.xml' and allow the server to add this in programtically #91)

Related:

• create a flat file export command #289
• "Live" flat file export #530
• change the war command to use flat file export features #348