Add WebJar integration for Java sites

[khawkins98]

Have had a request to make a WebJar of the EBI Visual Framework.

Expect we could have at least three WebJars:

• Full framework
• Lite framework
• Icon fonts

Some basic information on making a WebJar: http://www.webjars.org/contributing

On the face of it, this is pretty straightforward — but if anyone wants to run with, they'd be most welcome.