v0.6.0

Changelog:

* Browser bundle
* Data Structures
 * forEach in Hash Table, Set, Heap and Queue
 * Set
* String
 * Longest common subsequence
* Math
 * Logarithmic time Fibonacci
* Graph
 * Kruskal's MST
 * Prim's MST
 * DFS
 * BFS
 * Floyd-Warshall