Restructure source code

the following structure must be achieved:

```
/configure
/doc
/include
/gen
/src
    /client
    /jpeg
    /jpeg_mmx
    /server
    /log4tango
/test
    /ds
    /new_tests
    /asyn
    /event
    /old_tests
```

`doc` contains doxygen

`include` contains all installabe header files (server, server/idl, client, client/helpers, log4tango)

`gen`  generated source files from IDL
