Removes old AVL tree
Fixes the span problem where rotations were made, but the spans not properly updated.
Adds more tests that have previously failed.
Makes FindOverlaps use FindNodes that returns nodes with potential overlaps, which can then be returned through a single method layer, instead from deep inside a recursive call stack.
Removes Pex project
Ensures building of UserGuideExamples
Adds train example from SMS
Small comments
Fixes error in DIT where rotations in addHigh were made when not needed!
Merge branch 'master' of https://github.com/lundmikkel/C5