Merge pull request #2 from li1234yun/trees_any_type_value

Modify trees value generic type to any for allowing receive map/slice etc

Quality Gate Status link fixed.

Broken link fixed(github.com/emirpasic/gods).

Readme edited for installation.

Documentation and examples completed for first relase.

Examples updated to generic implemantation.

Tree Bidi Map generic implementation completed.

Priority Queue generic implementation completed.

Linked List Stack generic implementation completed.

Comparator make it generic to improve performance.