Fixed broken links. Fixes #111

Removed broken links and fixed mistyped links.

## Removed:
[[edeng (Java)]](https://github.com/edeng/Problems/blob/master/factorial.java)
[[zhangyangyu (Python)]](https://github.com/zhangyangyu/Projects-Mine/blob/master/binary_decimal.py)
[[Aoufa (Python)]] (https://github.com/Aoufa/Cost-of-tiles-to-cover-a-floor-with-width-tiles--and-height-tiles-/blob/master/tiles_cost.py)
[[zhangyangyu (Python)]](https://github.com/zhangyangyu/Projects-Mine/blob/master/prime.py)
[[jbruno2 (C++)]](https://github.com/jbruno2/Simple-Programs-and-Solutions/blob/master/Fibonacci%20Sequence.cpp)
[[ankushagarwal11(Python)]](https://github.com/ankushagarwal11/learn_python/blob/master/fibonacci.py)
[[zhangyangyu (Python)]](https://github.com/zhangyangyu/Projects-Mine/blob/master/fibonacci.py)
[[hariharanrangasamy (Python)]](https://github.com/hariharanrangasamy/Projects/blob/master/Classic%20Algorithms/bubblesort.py)
[[hariharanrangasamy (Python)]](https://github.com/hariharanrangasamy/Projects/blob/master/Classic%20Algorithms/mergesort.py)
[[JLukeC (Python)]](https://github.com/jLukeC/mega-project-list/blob/master/python/count_vowels.py)
[[tel (Haskell)]](https://github.com/tel/Projects/blob/master/Text/Vigenere.hs)
[[jbruno2 (python)]](https://github.com/jbruno2/Simple-Programs-and-Solutions/blob/master/C%2B%2B/Bank%20Account%20Class.py)
[[jiang (c++)]](https://github.com/jiang42/Projects/blob/master/Security/cipher.cpp)

## Fixed:
[[luisccastillo (C#)]](https://github.com/luisccastillo/Projects/blob/master/Classic%20Algorithms/collatz_cojecture.cs)