Libusb Java Code

Added Urs Graf's overview image

- Bugfix: LibusbJava.cpp, Ln 1288 removed the manipulation of the return value
- Bugfix: Guaranteeing '\0'-Termination of the retrieved C-Strings for all libusb_get_string_descriptor* calls
- Change: The whole interface makes now use of exceptions to pass errors into the java environment instead encoding them into return values.
- Change: Allowing Descriptor strings to have a length of 0

- Added the depricated annotation for the legacy-libusb class

- Added Libraries to bind against

- Corrected include path settings, so the C/C++ Analysis of Eclipse Indigo works
- Added a debug build option to build.xml

- The evaluation of the return value was not correct.
- There is still an issue with this kind of evaluation as there could be handles being
valid but have negative number. See Bug ID: 3515055 for details

- Bug#3316451 Changed the "shouldn't happen" sections. Instead of just stopping the iteration we continue to a normal end.

- Inserted a helperfunction to convert buffers to byte arrays that provides:
- Consequent error handling (especially allocation errors)
- fast uniform access to the java array class
- Added some parameter checks in the changed functions to avoid dereferencing of invalid pointers

- Removed obsolete folder

- Adding Roger Millischers work on the java side making libusb 1.0 run