added argmin and argmax
min conflict value selection with random tie
Added test to argmin argmaxfunctions
fix test_min_conflicts
Merge pull request #59 from arielrossanigo/improve_min_conflicts

Improve min conflicts
Added LifoList and sorted method to lists
change the way to pass the fringe to viewers
Added test viewer
Fix typo
another fringe log
added test for expand order
fix explore set memory leak
Merge pull request #56 from arielrossanigo/fix_fringe_order

Fix order in logged fringes
Merge pull request #57 from arielrossanigo/fix_explore_set

Fix explore set
No more need to have a childs temorary list, work directly on the fringe
Memory doesn't needs key-value, a set is enough now
Merge branch 'better-closed-list-and-childs-insertion' into develop
Up version for minor release
Merge branch 'develop'