New build script to install dependencies automatically

MANIFEST

@@ -0,0 +1,25 @@
+Build.PL
+lib/Slic3r.pm
+lib/Slic3r/Extruder.pm
+lib/Slic3r/ExtrusionLoop.pm
+lib/Slic3r/ExtrusionPath.pm
+lib/Slic3r/ExtrusionPath/Collection.pm
+lib/Slic3r/Fill.pm
+lib/Slic3r/Fill/Rectilinear.pm
+lib/Slic3r/Geometry.pm
+lib/Slic3r/Geometry/DouglasPeucker.pm
+lib/Slic3r/Layer.pm
+lib/Slic3r/Line.pm
+lib/Slic3r/Perimeter.pm
+lib/Slic3r/Point.pm
+lib/Slic3r/Polyline.pm
+lib/Slic3r/Polyline/Closed.pm
+lib/Slic3r/Print.pm
+lib/Slic3r/STL.pm
+lib/Slic3r/Surface.pm
+lib/Slic3r/Surface/Collection.pm
+lib/Slic3r/SVG.pm
+MANIFEST			This list of files
+README.markdown
+slic3r.pl
+t/clean_polylines.t