Bootstrap considerations

Some considerations moving forward with bootstrap process:

• The idea of ClassLoaderAccess I think needs to go away. Use of the temp ClassLoader needs to be very specific. We should use it just to load classes (if/when needed) during the first phase of bootstrap, and the classed loaded through it should not be used beyond that first phase.

• Same (^^) with Jandex, although we are not yet using the Jandex index.

• All told, I think we need a new group of settings to represent transient building options.