grindingcoil/act_timeline — pull request #23 by grindingcoil (2014-05-07 14:13:06+00:00)
Title: Interval tree

Address #20

No more O(N) look-ups!
- alerts : binary tree O(ln N + d)
- items: interval tree (augmented tree) O(ln N + d)
- anchors: binary tree O(ln N + d)