added dummy header for red-black tree
Merge branch 'development' into tree
Merge branch 'development' into tree
Merge branch 'development' into tree
renamed tree implementation to "tree" as only one implementation is planned
First draft of binary tree implementation
commit tests for tree
Added rakefile in prep for move to rscons
Merge changes from dev
prev_node function & tests
list_delete_node function & tests
list_index_of function & tests
Merge pull request #12 from abellenir/list_index_of

List index of
Merge pull request #11 from abellenir/list_delete_node

List delete node