Add perl modules needed to build "slic3r"

Slic3r is a tool to convert a digital 3D model into printing
instructions for your 3D printer. I have some build/run issues with it
so add it later. I just think it would be good to get these modules in now.

Sorry for adding all in one commit, but I added them on a need-to basis when trying to build slic3r. That means I started on the top of the dependency tree. For bisectable git history I would have had to start at the bottom. And splitting them up now, in the correct order, seems like a very boring task.

These perl modules are added:
  AlienWxWidgets
  BoostGeometryUtils
  constant-defer
  ExtUtilsCppGuess
  ExtUtilsTypemapsDefault
  ExtUtilsXSpp
  GrowlGNTP
  MathLibm
  MathClipper
  MathConvexHullMonotoneChain
  MathGeometryVoronoi
  MathPlanePath
  ModuleBuildWithXSpp
  NetDBus
  Spiffy
  TestBase
  Wx

A couple of old modules were no longer available on CPAN so I bumped
them:
  DataUUID
  ExtUtilsMakeMaker
  ExtUtilsManifest
  version
  VersionRequirements

XMLTwig fails in the test phase (it is missing a dependencies), so the
test is skipped. (How did it pass the test before?)