template fixes in /include/cg/io
Merge pull request #5 from ZumZoom/io_fix

template fixes in /include/cg/io
Contour class refactored
Merge remote-tracking branch 'upstream/master'
fat commit

[+] some operations. I'll push some interfaces, pull implementation for
them
[+] triangle_contains_point example
[+] bug fixes
Merge branch 'contour_fix'
Merge remote-tracking branch 'upstream/master'

Conflicts:
	include/cg/primitives/contour.h
	include/cg/primitives/triangle.h
	tests/CMakeLists.txt
fixes in point_2t, older files removed
random_utils and orientation test: random from c++11
first attempt of using CGAL for testing
all tests are using CGAL now