Automate building the primary Equella Blackboard building block

[cbeach47]

The primary Equella Blackboard building block should be automated outside of an IDE, most likely with sbt since the core Equella product uses that build tool now.

Source for the primary building block is here

Please document build process in the master doc repo for Equella here

Items to complete:

• Build via Gradle with no errors > output a war
• Check the licenses
  See LICENSES.md. Chasing a few open items before we can align on a license (aiming for Apache 2.0 for source and binary)
• Implement Apereo headers
  Could use a gradle plugin for header placement / checking. Cannot implement fully until the above step is complete.
• Copy over the icons.xml to the B2 and the WS
• Build the web service. Ideally bundle it in with the war
• Wire in ProGuard for the web service
  Considering this optional at this point.
• Fix the editorconfig to match Equella's

[cbeach47]

Blackboard 3400 should (and in some cases needs to) have precompiled JSPs. I haven't found a good way to do that with SBT yet, so gradle is now in the running for the build tool to use here.

[cbeach47]

Merged the functional part of the changes into master so I can branch the code and begin work on the v3400 series changes while the licensing is investigated.