New Features: Knapsack {0, 1}

New features Knapsack algorithm by @Amir-Shamsi in #28

• complete the knapsack algorithm by @Amir-Shamsi in #29
• changes of Knapsack by @Amir-Shamsi in #30
• ultimate option by @Amir-Shamsi in #31
• knapsack-completion by @Amir-Shamsi in #32
• bugs fixed by @Amir-Shamsi in #33
• refactor the name of sequence files by @Amir-Shamsi in #34
• example for knapsack by @Amir-Shamsi in #35
• version updated to 0.2.0 by @Amir-Shamsi in #36

contribute with @mohammadkeshavarzi

Full Changelog: 0.1.3...0.2.0