Removed beans

> The goal is to fix some of the innumerable problems with scala while retaining a painless transition path for existing scala code.

Good! Since we have macros now, I've started by removing beans.

The compiler reflects on some of the bean classes, so they were left in the library until next release.

Note: I can't get it to compile, I am getting:
```
[info] 'compiler-interface' not yet compiled for Scala 1.0.0-M4. Compiling...
java.lang.NoClassDefFoundError: Could not initialize class scala.tools.nsc.Main$
	at scala.tools.nsc.Main.process(Main.scala)
```