Point highlighting & improved hints
minor fixes
Merge branch 'master' of https://github.com/mcquay239/cg

Conflicts:
	examples/operations/triangle_contains_point.cpp
graham bug fixes
[+] andrew's convex hull
[+] segments intersection example
[+] triangle intersects segment example
[+] rectangle intersects segment example
Hash maps for point & segment buffers
Merge pull request #12 from ZumZoom/fix

fixes + andrew's hull
Merge pull request #14 from lisyarus/draw

Drawer improvement
Fix bug in algo "Andrew hull"
Add tests for algo "Andrew hull"
[+] checking ccw contour for convex with tests
[+] checking contour for ccw orientation with tests
rectangle-segment intersection method uses 1 segment intersection instead of 4
[+] convex ccw contour contains point (with tests)
[+] visualization for "checking contour for ccw orientation"
[+] visualization for "checking ccw contour for convex"
[+] visualization for "convex ccw contour contains point"