initial commit for IDW and least squares experiments
merge master
add VectorXZ.angleBetween
begin DelaunayTriangulation implementation
create Delaunay debug viewer
trees and other points in areas take elevation into account
show terrain based on interpolation
draw circumcircles in viewer
fix VectorXZ angle calculations
fix bugs in DelaunayTriangulation
add standard methods to TriangleXZ
add test class for DelaunayTriangulation
implement undo methods in DelaunayTriangulation
add remove method to IntersectionGrid
implement a NaturalNeighborStrategy and expose it to the viewer
improve DelaunayTriangulation (visibility walks etc.)
add area calculation to TriangleXZ
first working version of natural neighbor interpolation
make SRTM work everywhere
move SRTMData creation into ConversionFacade