initial algorithms commit
 changed junit to 1.4
 moved ArrayUtil tests to junit
 moved BinarySearchTreeUtil tests to junit tests
 deleted AppTest
 moved GraphUtil tests to junit tests
 moved StringUtil tests to junit tests
 moved LinkedListUtil tests to junit tests
 moved SortingUtil tests to junit tests
 clear project and settings
 add .project and .settings to gitignore
 merged origin/master into master