Add query operation for tree.

[fumiphys]

euler tour + lca + segment tree

[fumiphys]

• https://github.com/fumiphys/programming_contest/blob/master/tree/range_query_on_tree.hpp will be merged into https://github.com/fumiphys/programming_contest/issues/46

[fumiphys]

due to the revision of euler tour, lca and addition of heavy-light decomposition, range query on tree should be revised.

• path query(seg and lazy seg)
• subtree query(seg and lazy seg)