Need a better definition of being contonous on parent. Should not
require flatness in overlapping region.
fixed a bug where complementary windows didnt account for the
overlapping region not required being flat for subwindowing / merging
removed unnecessary blocking of flatness estimation with few values.
removed else if statement that rendered only left-subwiindowng possible
and not both left and right.
cleaned up output
removed overdone output calls
moved WLMC over to submodule