Merge branch 'fix-readme-examples'
Merge branch 'develop'
Prevent impossible moves to the left or right.
Fix incorrect exception text (change direction, left to right).
Check node has parent before attempting to check if move is possible.
Merge branch 'master' of git://github.com/ziadoz/baum into prevent-impossible-lr-moves
Add test cases for when we should expect an exception indicating that a right/left move is not possible.
Actually when moving nodes around if we cannot move to the right/left the target sibling node will be NULL so we only need to check for that. This makes all the tests pass again.
Improve error messages for this particular race condition.
Merge branch 'prevent-impossible-lr-moves' into develop
Add Node::all() method override to return the
results sorted by the lft column.
Merge branch 'add-static-all-method' into develop
Modify README.md
Bump version and upgrade CHANGELOG