Code Generator for Eclipse Code

Don't externalize constant strings

Use casting for the correct return type

Specified the 1.5 SE as execution environment

Add an EntityResolver that handles namespace verification. The choosen implementation rilies on the fact, that the input data is well formed and must not be validated in a time costly manner.
This concludes the most pressuing issue of #5.

Merged from branch

Update Version to 1.1.1

Update SDK Build

Removed unnecessairy dependencies

Move ch.sahits.codegen.java.gui to trunk directory