scanning for VirtualBox tools
Added command line option `-q` that disables the last `getchar()` for unattended analysis.
Changed command return value to match the analysis result; with the following scheme:
 - Everything `OK` -> 0
 - Something `suspicious` but nothing `traced` -> 1
 - Something `traced` -> 2
Merge pull request #16 from Thorsten-Sick/vbox_tools

scanning for VirtualBox tools
Changed strcmp for strncmp.
Merge branch 'unattended_and_retval' into unattended_and_retval2
Restored binary file to previous verion. Let's the author compile it himself.
Merge pull request #18 from nilp0inter/unattended_and_retval2

Unattended analysis and return value. (Fixed)