[BUILD] change working boost version numbers

- since boost 1.46 does not work any more and 1.48 works, we should not
  have cmake detect a working version of boost and use that
[BUILD,FIX] bugfix: add all Wm libraries

- before, only the last wildmagic library of the WM5_LIBS libraries was
  added to _WM5_LIBRARIES
- fixed this, now multiple Wm5 libraries are possible
[BUILD] enable finding wildmagic on debian

on debian, libwildmagic headers can be found under
/usr/include/libwildmagic/ and also searching this path, system
wildmagic can be found and used with OpenMS
[BUILD] add default path for searching libraries

- on debian systems, most libraries are in /usr/lib and /usr/include so
  adding this as default would allow for very simple cmake commands
[TEST] remove test for non-Windows platforms

- using the debian system libraries, this test also fails and it is not
  clear why we should have tests that only work under certain
  circumstances and certain platforms
Merge pull request #859 from hroest/feature/SystemWm

Feature/SystemWildMagic