Initial commit
Adding test cases for insert and delete case 2.1.1, 2.2.1, 2.2.2 and a typo fix in rbtree.go
Adding one more test case for delete cases 2.2.1, 2.2.2
Adding test case for delete case 2.1.2 ( covers 2.2.2 as well)
Adding test case for delete case 1.1 ( covers 2.2.2 as well)
Adding another test case for delete case 1.1 ( covers 2.2.2 as well), where there is only one rotation
Adding another test case for delete case 1.2 ( covers 2.2.2 as well), where there is only recoloring
Merge pull request #1 from anuchandy/dev

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