prepared test case to easily create multiple test lines
moved lualib from own folder into Makefile of types
BoundingBox passes centroid test
implemented bounding box for ellipse
Type::Line passes BoundingBox test
fixed compile error due to G++ 4.2 bug
started test case for intype bounding box calculation
added new Lua functions: createGroup, getGroup
New type VirtualGroup implemented
long overdue formatting of code
