56: move core Poly2Tri down to Net2.0
57: explore ...
58: TriangulationPoint's Edges

make private
59: update Polytri
60: update Poly2Tri
Merge branch 'poly2tri_test' into v_mini01
61: MiniTess

Explore ...
62: explore Tess
63: test tess
64: song ho's Tess examples
65: refactor
66: change some array to local vars
70: change some arr to local vars 2
71
Merge branch 'v_tess' into v_mini01
72: explore agg core
74: focus on RGBA color actor

choose appropriate ctor at compile time
80: refactor
81
82:  NativeBufferMan