* [CREATE] Problem 28 solution for Project Euler
* [UPDATE] Added an explanation for the formula used in the algorithm
* [CREATE] Added Problem 35 for Project-Euler
* [UPDATE] Little typo in the error string
* [UPDATE] Some algorithm changes
* [UPDATE] Fix test string
* [UPDATE] Change prime numbers generator to import a standard sieve
algorithm.
* [UPDATE] Change sieve algorithm implementation and now the solution
works well. Also added some optimizations
