Sanitized the build system before merging the new DiSL agent:

- The build.xml file has been cleaned up extensively.
- The build system for examples has been simplified and cleaned up.
- There is support for binary DiSL releases with examples and documentation.
- Examples should be used with a binary DiSL distribution (see output/dist).
- Moved the disl.py launcher out of the examples subdirectory.
- Test suite Runner has been modified to accept locations and native library names from outside.