* add LSD supportsVec4iResult

* LineSegmentDetector.drawSegments: support vector<Vec4i>

* test_lsd.cpp: replace detect()

* test_lsd.cpp: add compareSegments tests

* lsd.cpp: LSD.compareSegments support Vec4i

* test_lsd.cpp: fix trailing whitespace

- removed tr1 usage (dropped in C++17)
- moved includes of vector/map/iostream/limits into ts.hpp
- require opencv_test + anonymous namespace (added compile check)
- fixed norm() usage (must be from cvtest::norm for checks) and other conflict functions
- added missing license headers

Let LineSegmentDetector output line segment coordinates in float precision, as supported by the LSD algorithm.

Update on the class to reflect the review. Split the class into virtual and implementation. change of name to LineSegmentDetector, using Input/Output-Arrays, general clean ups.