v0.1.0, 7/28/15 -- Initial release.
v0.1.1, 7/28/15 -- Slight changes in names.
v0.1.3, 7/30/15 -- Moved node_value function into problem and changed priorityqueue to priority set implemented using blist
v0.1.4, 7/30/15 -- Removed print statements
v0.1.5, 7/30/15 -- Fixed bug in updating path
v0.1.6, 7/31/15 -- Removed uuid because it is slow
v0.1.7, 7/31/15 -- Fixed bug related to update path
v0.1.8, 7/31/15 -- Reimplemented beam search to use breadth first expansion.
v0.1.9, 8/1/15 -- Updated all of the docs and updated beam search to reexpand better duplicates
v0.2.0, 8/1/15 -- Added local search optimization techniques and assignment problem example
v1.0.0, 7/21/16 -- Refactored library into uninformed, informed, and optimization techniques and added tests.
